diff --git a/src/bin/main.rs b/src/bin/main.rs
index f83f88f..6db053a 100644
--- a/src/bin/main.rs
+++ b/src/bin/main.rs
@@ -84,6 +84,7 @@ fn main() {
                                     Some(item::weapon::WeaponAttribute{attr: item::weapon::Attribute::Dark, value: 30}),
                                     None,],
                             tekked: true,
+                            modifiers: Vec::new(),
                         }
                     ),
                     location: ItemLocation::Inventory {
@@ -103,6 +104,7 @@ fn main() {
                                     Some(item::weapon::WeaponAttribute{attr: item::weapon::Attribute::Dark, value: 30}),
                                     None,],
                             tekked: true,
+                            modifiers: Vec::new(),
                         }
                     ),
                     location: ItemLocation::Inventory {
@@ -122,6 +124,7 @@ fn main() {
                                     Some(item::weapon::WeaponAttribute{attr: item::weapon::Attribute::Dark, value: 100}),
                                     None,],
                             tekked: true,
+                            modifiers: Vec::new(),
                         }
                     ),
                     location: ItemLocation::Inventory {
@@ -141,6 +144,7 @@ fn main() {
                                     Some(item::weapon::WeaponAttribute{attr: item::weapon::Attribute::Dark, value: 100}),
                                     None,],
                             tekked: true,
+                            modifiers: Vec::new(),
                         }
                     ),
                     location: ItemLocation::Inventory {
@@ -160,6 +164,7 @@ fn main() {
                                     Some(item::weapon::WeaponAttribute{attr: item::weapon::Attribute::Dark, value: 100}),
                                     Some(item::weapon::WeaponAttribute{attr: item::weapon::Attribute::Native, value: 100}),],
                             tekked: true,
+                            modifiers: Vec::new(),
                         }
                     ),
                     location: ItemLocation::Inventory {
@@ -179,6 +184,7 @@ fn main() {
                                     Some(item::weapon::WeaponAttribute{attr: item::weapon::Attribute::Dark, value: 80}),
                                     None,],
                             tekked: false,
+                            modifiers: Vec::new(),
                         }
                     ),
                     location: ItemLocation::Bank {
diff --git a/src/entity/item/armor.rs b/src/entity/item/armor.rs
index a97a508..48e41ee 100644
--- a/src/entity/item/armor.rs
+++ b/src/entity/item/armor.rs
@@ -1,4 +1,5 @@
 use serde::{Serialize, Deserialize};
+use crate::entity::item::ItemEntityId;
 
 #[derive(Debug, Copy, Clone)]
 pub enum ItemParseError {
@@ -288,12 +289,21 @@ impl ArmorType {
 }
 
 
-#[derive(Debug, Copy, Clone, PartialEq)]
+#[derive(Debug, Clone, PartialEq)]
+pub enum ArmorModifier {
+    AddSlot {
+        addslot: ItemEntityId,
+    }
+}
+
+
+#[derive(Debug, Clone, PartialEq)]
 pub struct Armor {
     pub armor: ArmorType,
     pub dfp: u8,
     pub evp: u8,
     pub slots: u8,
+    pub modifiers: Vec<ArmorModifier>
 }
 
 impl Armor {
@@ -314,6 +324,7 @@ impl Armor {
                 dfp: data[6],
                 evp: data[8],
                 slots: data[5],
+                modifiers: Vec::new(),
             })
         }
         else {
diff --git a/src/entity/item/mag.rs b/src/entity/item/mag.rs
index ac34e62..130bd2b 100644
--- a/src/entity/item/mag.rs
+++ b/src/entity/item/mag.rs
@@ -1,4 +1,5 @@
 use serde::{Serialize, Deserialize};
+use crate::entity::item::ItemEntityId;
 
 #[derive(Debug, Copy, Clone)]
 pub enum ItemParseError {
@@ -251,6 +252,15 @@ impl MagType {
     }
 }
 
+#[derive(Debug, Clone, PartialEq)]
+pub enum MagModifier {
+    FeedMag{
+        food: ItemEntityId,
+    },
+    BankMag,
+    MagCell(ItemEntityId),
+}
+
 #[derive(Debug, Copy, Clone, PartialEq)]
 pub enum PhotonBlast {
     Farlla,
@@ -261,7 +271,7 @@ pub enum PhotonBlast {
     MyllaYoulla,
 }
 
-#[derive(Debug, Copy, Clone, PartialEq)]
+#[derive(Debug, Clone, PartialEq)]
 pub struct Mag {
     pub mag: MagType,
     pub def: u16,
@@ -272,6 +282,7 @@ pub struct Mag {
     pub iq: u8,
     pub photon_blast: [Option<PhotonBlast>; 3],
     pub color: u8,
+    pub modifiers: Vec<MagModifier>,
 }
 
 
@@ -371,6 +382,7 @@ impl Mag {
                 iq: iq,
                 photon_blast: [None, None, None], // TODO: actually get PBs from bytes
                 color: data[15] % 18,
+                modifiers: Vec::new(),
             })
         }
         else {
diff --git a/src/entity/item/weapon.rs b/src/entity/item/weapon.rs
index 4421d53..48a0e4c 100644
--- a/src/entity/item/weapon.rs
+++ b/src/entity/item/weapon.rs
@@ -1,3 +1,4 @@
+use crate::entity::item::ItemEntityId;
 use serde::{Serialize, Deserialize};
 
 #[derive(Debug, Copy, Clone)]
@@ -1330,13 +1331,47 @@ impl WeaponType {
     }
 }
 
+
+#[derive(Debug, Copy, Clone, PartialEq)]
+pub enum TekSpecialModifier {
+    Plus,
+    Neutral,
+    Minus,
+}
+
 #[derive(Debug, Copy, Clone, PartialEq)]
+pub enum TekPercentModifier {
+    PlusPlus,
+    Plus,
+    Neutral,
+    Minus,
+    MinusMinus,
+}
+
+#[derive(Debug, Clone, PartialEq)]
+pub enum WeaponModifier {
+    AddPercents {
+        attr: WeaponAttribute,
+        pds: Vec<ItemEntityId>,
+    },
+    AddGrind {
+        amount: u32,
+        grinder: ItemEntityId,
+    },
+    Tekked {
+        special: TekSpecialModifier,
+        percents: TekPercentModifier,
+    },
+}
+
+#[derive(Debug, Clone, PartialEq)]
 pub struct Weapon {
     pub weapon: WeaponType,
     pub special: Option<WeaponSpecial>,
     pub grind: u8,
     pub attrs: [Option<WeaponAttribute>; 3],
     pub tekked: bool,
+    pub modifiers: Vec<WeaponModifier>
 }
 
 
@@ -1348,6 +1383,7 @@ impl Weapon {
             grind: 0,
             attrs: [None; 3],
             tekked: true,
+            modifiers: Vec::new(),
         }
     }
 
@@ -1416,6 +1452,7 @@ impl Weapon {
                     a[2], 
                     ],
                 tekked: t,
+                modifiers: Vec::new(),
             })
         }
         else {
diff --git a/src/login/character.rs b/src/login/character.rs
index 1d24efa..cade993 100644
--- a/src/login/character.rs
+++ b/src/login/character.rs
@@ -200,6 +200,7 @@ async fn new_character<EG: EntityGateway>(entity_gateway: &mut EG, user: &UserAc
                     special: None,
                     attrs: [None; 3],
                     tekked: true,
+                    modifiers: Vec::new(),
             }),
             location: ItemLocation::Inventory {
                 character_id: character.id,
@@ -214,7 +215,8 @@ async fn new_character<EG: EntityGateway>(entity_gateway: &mut EG, user: &UserAc
                     armor: item::armor::ArmorType::Frame,
                     dfp: 0,
                     evp: 0,
-                slots: 0,
+                    slots: 0,
+                    modifiers: Vec::new(),
                 }),
             location: ItemLocation::Inventory {
                 character_id: character.id,
@@ -235,6 +237,7 @@ async fn new_character<EG: EntityGateway>(entity_gateway: &mut EG, user: &UserAc
                     iq: 0,
                     photon_blast: [None; 3],
                     color: (character.appearance.skin % 18) as u8,
+                    modifiers: Vec::new(),
                 }),
             location: ItemLocation::Inventory {
                 character_id: character.id,
diff --git a/src/ship/drops/generic_armor.rs b/src/ship/drops/generic_armor.rs
index 2bf5895..18efbab 100644
--- a/src/ship/drops/generic_armor.rs
+++ b/src/ship/drops/generic_armor.rs
@@ -107,6 +107,7 @@ impl GenericArmorTable {
             dfp: dfp_modifier as u8,
             evp: evp_modifier as u8,
             slots: slots as u8,
+            modifiers: Vec::new(),
         }))
     }
 }
@@ -126,24 +127,28 @@ mod test {
             dfp: 0,
             evp: 0,
             slots: 1,
+            modifiers: Vec::new(),
         })));
         assert!(gat.get_drop(&MapArea::Caves3, &mut rng) == Some(ItemDropType::Armor(Armor {
             armor: ArmorType::AbsorbArmor,
             dfp: 1,
             evp: 1,
             slots: 1,
+            modifiers: Vec::new(),
         })));
         assert!(gat.get_drop(&MapArea::Forest2, &mut rng) == Some(ItemDropType::Armor(Armor {
             armor: ArmorType::HyperFrame,
             dfp: 0,
             evp: 0,
             slots: 0,
+            modifiers: Vec::new(),
         })));
         assert!(gat.get_drop(&MapArea::DarkFalz, &mut rng) == Some(ItemDropType::Armor(Armor {
             armor: ArmorType::ImperialArmor,
             dfp: 2,
             evp: 1,
             slots: 0,
+            modifiers: Vec::new(),
         })));
     }
 }
diff --git a/src/ship/drops/generic_weapon.rs b/src/ship/drops/generic_weapon.rs
index 71e578c..d00ad14 100644
--- a/src/ship/drops/generic_weapon.rs
+++ b/src/ship/drops/generic_weapon.rs
@@ -503,6 +503,7 @@ impl GenericWeaponTable {
             grind: weapon_grind as u8,
             attrs: weapon_attributes,
             tekked: weapon_special.is_none(),
+            modifiers: Vec::new(),
         }))
     }
 }
@@ -524,6 +525,7 @@ mod test {
             grind: 0,
             attrs: [None, None, None],
             tekked: true,
+            modifiers: Vec::new(),
         })));
 
         let gwt = GenericWeaponTable::new(Episode::One, Difficulty::Hard, SectionID::Skyly);
@@ -533,6 +535,7 @@ mod test {
             grind: 2,
             attrs: [None, None, None],
             tekked: true,
+            modifiers: Vec::new(),
         })));
 
         let gwt = GenericWeaponTable::new(Episode::One, Difficulty::VeryHard, SectionID::Skyly);
@@ -542,6 +545,7 @@ mod test {
             grind: 0,
             attrs: [None, None, None],
             tekked: false,
+            modifiers: Vec::new(),
         })));
 
         let gwt = GenericWeaponTable::new(Episode::One, Difficulty::Ultimate, SectionID::Skyly);
@@ -551,6 +555,7 @@ mod test {
             grind: 0,
             attrs: [Some(WeaponAttribute {attr: Attribute::ABeast, value: 30}), Some(WeaponAttribute {attr: Attribute::Dark, value: 30}), None],
             tekked: true,
+            modifiers: Vec::new(),
         })));
     }
 }
diff --git a/src/ship/drops/rare_drop_table.rs b/src/ship/drops/rare_drop_table.rs
index 56d564c..dc3dd47 100644
--- a/src/ship/drops/rare_drop_table.rs
+++ b/src/ship/drops/rare_drop_table.rs
@@ -104,6 +104,7 @@ impl RareDropTable {
                     grind: 0,
                     attrs: self.attribute_table.generate_rare_attributes(map_area, rng),
                     tekked: false,
+                    modifiers: Vec::new(),
                 })
 
             },
@@ -113,6 +114,7 @@ impl RareDropTable {
                     dfp: self.armor_stats.dfp_modifier(&armor, rng) as u8,
                     evp: self.armor_stats.evp_modifier(&armor, rng) as u8,
                     slots: self.armor_stats.slots(map_area, rng) as u8,
+                    modifiers: Vec::new(),
                 })
             },
             RareDropItem::Shield(shield) => {
@@ -144,6 +146,7 @@ impl RareDropTable {
                     synchro: 20,
                     photon_blast: [None; 3],
                     color: rng.gen_range(0, 18),
+                    modifiers: Vec::new(),
                 })
             }
         }
diff --git a/tests/test_bank.rs b/tests/test_bank.rs
index 99318f6..f0328bb 100644
--- a/tests/test_bank.rs
+++ b/tests/test_bank.rs
@@ -26,6 +26,7 @@ async fn test_bank_items_sent_in_character_login() {
                     special: None,
                     attrs: [None, None, None],
                     tekked: true,
+                    modifiers: Vec::new(),
                 }
             ),
             location: item::ItemLocation::Bank {
@@ -62,8 +63,9 @@ async fn test_request_bank_items() {
                         weapon: item::weapon::WeaponType::Vulcan,
                         grind: 0,
                         special: None,
-                    attrs: [None, None, None],
+                        attrs: [None, None, None],
                         tekked: true,
+                        modifiers: Vec::new(),
                     }
                 ),
                 location: item::ItemLocation::Bank {
@@ -156,6 +158,7 @@ async fn test_request_bank_items_sorted() {
                     special: None,
                     attrs: [None, None, None],
                     tekked: true,
+                    modifiers: Vec::new(),
                 }
             ),
             location: item::ItemLocation::Bank {
@@ -184,6 +187,7 @@ async fn test_request_bank_items_sorted() {
                     special: None,
                     attrs: [None, None, None],
                     tekked: true,
+                    modifiers: Vec::new(),
                 }
             ),
             location: item::ItemLocation::Bank {
@@ -231,6 +235,7 @@ async fn test_deposit_individual_item() {
                     special: None,
                     attrs: [None, None, None],
                     tekked: true,
+                    modifiers: Vec::new(),
                 }
             ),
             location: item::ItemLocation::Inventory {
@@ -248,6 +253,7 @@ async fn test_deposit_individual_item() {
                     special: None,
                     attrs: [None, None, None],
                     tekked: true,
+                    modifiers: Vec::new(),
                 }
             ),
             location: item::ItemLocation::Inventory {
@@ -639,6 +645,7 @@ async fn test_deposit_individual_item_in_full_bank() {
                     special: None,
                     attrs: [None, None, None],
                     tekked: true,
+                    modifiers: Vec::new(),
                 }
             ),
             location: item::ItemLocation::Inventory {
@@ -658,6 +665,7 @@ async fn test_deposit_individual_item_in_full_bank() {
                         special: None,
                         attrs: [None, None, None],
                         tekked: true,
+                        modifiers: Vec::new(),
                     }
                 ),
                 location: item::ItemLocation::Bank {
@@ -750,6 +758,7 @@ async fn test_deposit_stacked_item_in_full_bank() {
                         special: None,
                         attrs: [None, None, None],
                         tekked: true,
+                        modifiers: Vec::new(),
                     }
                 ),
                 location: item::ItemLocation::Bank {
@@ -842,6 +851,7 @@ async fn test_deposit_stacked_item_in_full_bank_with_partial_stack() {
                         special: None,
                         attrs: [None, None, None],
                         tekked: true,
+                        modifiers: Vec::new(),
                     }
                 ),
                 location: item::ItemLocation::Bank {
@@ -1046,6 +1056,7 @@ async fn test_withdraw_individual_item() {
                     special: None,
                     attrs: [None, None, None],
                     tekked: true,
+                    modifiers: Vec::new(),
                 }
             ),
             location: item::ItemLocation::Bank {
@@ -1429,6 +1440,7 @@ async fn test_withdraw_individual_item_in_full_inventory() {
                     special: None,
                     attrs: [None, None, None],
                     tekked: true,
+                    modifiers: Vec::new(),
                 }
             ),
             location: item::ItemLocation::Bank {
@@ -1447,6 +1459,7 @@ async fn test_withdraw_individual_item_in_full_inventory() {
                         special: None,
                         attrs: [None, None, None],
                         tekked: true,
+                        modifiers: Vec::new(),
                     }
                 ),
                 location: item::ItemLocation::Inventory {
@@ -1539,6 +1552,7 @@ async fn test_withdraw_stacked_item_in_full_inventory() {
                         special: None,
                         attrs: [None, None, None],
                         tekked: true,
+                        modifiers: Vec::new(),
                     }
                 ),
                 location: item::ItemLocation::Inventory {
@@ -1631,6 +1645,7 @@ async fn test_withdraw_stacked_item_in_full_inventory_with_partial_stack() {
                         special: None,
                         attrs: [None, None, None],
                         tekked: true,
+                        modifiers: Vec::new(),
                     }
                 ),
                 location: item::ItemLocation::Inventory {
diff --git a/tests/test_item_pickup.rs b/tests/test_item_pickup.rs
index 2b584c4..3f83927 100644
--- a/tests/test_item_pickup.rs
+++ b/tests/test_item_pickup.rs
@@ -176,6 +176,7 @@ async fn test_pick_up_meseta_when_inventory_full() {
                         special: None,
                         attrs: [None, None, None],
                         tekked: true,
+                        modifiers: Vec::new(),
                     }
                 ),
                 location: item::ItemLocation::Inventory {
@@ -254,6 +255,7 @@ async fn test_pick_up_partial_stacked_item_when_inventory_is_otherwise_full() {
                         special: None,
                         attrs: [None, None, None],
                         tekked: true,
+                        modifiers: Vec::new(),
                     }
                 ),
                 location: item::ItemLocation::Inventory {
@@ -352,6 +354,7 @@ async fn test_can_not_pick_up_item_when_inventory_full() {
                         special: None,
                         attrs: [None, None, None],
                         tekked: true,
+                        modifiers: Vec::new(),
                     }
                 ),
                 location: item::ItemLocation::Inventory {
@@ -371,6 +374,7 @@ async fn test_can_not_pick_up_item_when_inventory_full() {
                         special: None,
                         attrs: [None, None, None],
                         tekked: true,
+                        modifiers: Vec::new(),
                     }
                 ),
                 location: item::ItemLocation::Inventory {