diff --git a/src/jsonmanager/json_manager.rs b/src/jsonmanager/json_manager.rs
index cf2a906..2cbfa89 100644
--- a/src/jsonmanager/json_manager.rs
+++ b/src/jsonmanager/json_manager.rs
@@ -4,9 +4,15 @@ use std::collections::{HashMap, BTreeMap};
 
 use serde::Deserialize;
 use serde::de::DeserializeOwned;
+
+use rand::{seq::IteratorRandom, thread_rng};
+
 use crate::jsonmanager::gather::Gather;
+use crate::jsonmanager::material::Material;
+use crate::jsonmanager::reliquary::{Reliquary, ReliquaryAffix, ReliquaryMainProp};
 use crate::jsonmanager::shop_goods::ShopGoods;
 use crate::jsonmanager::shop_rotate::ShopRotate;
+use crate::jsonmanager::weapon::Weapon;
 
 use super::avatar_skill_depot::AvatarSkillDepot;
 use super::entity_curve::EntityCurve;
@@ -41,6 +47,13 @@ pub struct JsonManager {
     pub gathers: HashMap<u32, Gather>,
     pub shop_goods: HashMap<u32, Vec<ShopGoods>>,
     pub shop_rotate: HashMap<u32, Vec<ShopRotate>>,
+    pub weapons: HashMap<u32, Weapon>,
+    pub reliquaries: HashMap<u32, Reliquary>,
+
+    pub reliquary_main_prop_depot: HashMap<u32, Vec<ReliquaryMainProp>>,
+    pub reliquary_affixes: HashMap<u32, Vec<ReliquaryAffix>>,
+
+    pub materials: HashMap<u32, Material>,
 }
 
 impl std::fmt::Debug for JsonManager { // TODO: fucking hack!
@@ -62,6 +75,14 @@ impl JsonManager {
         let gathers: Vec<Gather> = reader.read_json_list("Gather");
         let shop_goods: Vec<ShopGoods> = reader.read_json_list("ShopGoods");
         let shop_rotate: Vec<ShopRotate> = reader.read_json_list("ShopRotate");
+        let weapons: Vec<Weapon> = reader.read_json_list("Weapon");
+
+        let reliquaries: Vec<Reliquary> = reader.read_json_list("Reliquary");
+
+        let reliquary_main_prop_depot : Vec<ReliquaryMainProp> = reader.read_json_list("ReliquaryMainProp");
+        let reliquary_affixes : Vec<ReliquaryAffix> = reader.read_json_list("ReliquaryAffix");
+
+        let materials: Vec<Material> = reader.read_json_list("Material");
 
         return JsonManager {
             reader: reader,
@@ -76,8 +97,52 @@ impl JsonManager {
                 .collect(),
             shop_rotate: group_nonconsec_by(shop_rotate, |sr| sr.rotate_id).into_iter() // TODO: we're grouping by rotate_id, not by ID!
                 .collect(),
+            weapons: weapons.into_iter().map(|w| (w.id, w)).collect(),
+            reliquaries: reliquaries.into_iter().map(|r| (r.id, r)).collect(),
+
+            reliquary_main_prop_depot: group_nonconsec_by(reliquary_main_prop_depot, |mp| mp.prop_depot_id).into_iter()
+                .collect(), // TODO: we're grouping by depot_id!
+            reliquary_affixes: group_nonconsec_by(reliquary_affixes, |a| a.depot_id).into_iter()
+                .collect(), // TODO: we're grouping by depot_id!
+
+            materials: materials.into_iter().map(|m| (m.id, m)).collect(),
         };
     }
+
+    pub fn is_item_weapon(&self, item_id: u32) -> bool {
+        return self.weapons.contains_key(&item_id)
+    }
+
+    pub fn is_item_reliquary(&self, item_id: u32) -> bool {
+        return self.reliquaries.contains_key(&item_id)
+    }
+
+    pub fn is_item_material(&self, item_id: u32) -> bool {
+        return self.materials.contains_key(&item_id)
+    }
+
+    // TODO: I'm not sure those two methods should belongs here!
+    pub fn roll_reliquary_stats_by_item_id(&self, item_id: u32) -> (u32, Vec<u32>) {
+        let reliquary = match self.reliquaries.get(&item_id) {
+            None => panic!("Rolling for stats of item {} which is not in reliquary dict!", item_id),
+            Some(reliquary) => reliquary,
+        };
+
+        return self.roll_reliquary_stats(reliquary.main_prop_depot_id, reliquary.append_prop_depot_id, reliquary.append_prop_num);
+    }
+
+    pub fn roll_reliquary_stats(&self, main_depot_id: u32, affix_depot_id: u32, num_affices: usize) -> (u32, Vec<u32>) {
+        let mut rng = rand::thread_rng();
+
+        let main_depot = &self.reliquary_main_prop_depot[&main_depot_id];
+        let affix_depot = &self.reliquary_affixes[&affix_depot_id];
+
+        let main_stat = main_depot.iter().choose(&mut rng).unwrap().id;
+
+        let sub_stats: Vec<u32> = affix_depot.iter().choose_multiple(&mut rng, num_affices).iter().map(|a| a.id).collect(); // TODO: roll without weights!
+
+        return (main_stat, sub_stats);
+    }
 }
 
 impl JsonReader {
diff --git a/src/jsonmanager/material.rs b/src/jsonmanager/material.rs
index e69de29..3eae5ed 100644
--- a/src/jsonmanager/material.rs
+++ b/src/jsonmanager/material.rs
@@ -0,0 +1,30 @@
+use serde::{Serialize, Deserialize};
+
+#[derive(Deserialize, Clone)]
+#[serde(rename_all="PascalCase")]
+pub struct MaterialUseParam {
+    pub use_op: Option<String>, // TODO: that's an enum!
+    pub use_param: Vec<String>, // Most of the time they are integers tho
+}
+
+#[derive(Deserialize, Clone)]
+#[serde(rename_all="PascalCase")]
+pub struct Material {
+    pub id: u32,
+    #[serde(default)]
+    pub no_first_get_hint: bool,
+    pub rank: Option<u32>,
+    pub rank_level: Option<u32>,
+    pub stack_limit: Option<u32>,
+    pub max_use_count: Option<u32>,
+    pub gadget_id: Option<u32>,
+
+    #[serde(default)]
+    pub use_on_gain: bool,
+    pub item_use: Vec<MaterialUseParam>,
+    pub use_target: Option<String>, // TODO: that's an enum!
+
+    /*
+        Misc fields omitted
+     */
+}
\ No newline at end of file
diff --git a/src/jsonmanager/mod.rs b/src/jsonmanager/mod.rs
index b4f9b01..e0ac2c3 100644
--- a/src/jsonmanager/mod.rs
+++ b/src/jsonmanager/mod.rs
@@ -10,6 +10,9 @@ mod gadget_prop;
 mod gather;
 mod shop_goods;
 mod shop_rotate;
+mod weapon;
+mod reliquary;
+mod material;
 
 pub use entity_curve::{CurveInfo,EntityCurve};
 pub use shop_goods::ShopGoods;
\ No newline at end of file
diff --git a/src/jsonmanager/reliquary.rs b/src/jsonmanager/reliquary.rs
new file mode 100644
index 0000000..bb95683
--- /dev/null
+++ b/src/jsonmanager/reliquary.rs
@@ -0,0 +1,37 @@
+use serde::{Serialize, Deserialize};
+
+#[derive(Deserialize, Clone)]
+#[serde(rename_all="PascalCase")]
+pub struct Reliquary {
+    pub id: u32,
+    pub main_prop_depot_id: u32,
+    pub append_prop_depot_id: u32,
+    #[serde(default)]
+    pub append_prop_num: usize,
+    pub set_id: Option<u32>,
+    /*
+        Other fields omitted
+     */
+}
+
+#[derive(Deserialize, Clone)]
+#[serde(rename_all="PascalCase")]
+pub struct ReliquaryMainProp {
+    pub id: u32,
+    pub prop_depot_id: u32,
+    pub prop_type: proto::FightPropType,
+    pub affix_name: String,
+    //pub weight: u32, // TODO: removed in 2.5.0!
+}
+
+#[derive(Deserialize, Clone)]
+#[serde(rename_all="PascalCase")]
+pub struct ReliquaryAffix {
+    pub id: u32,
+    pub depot_id: u32,
+    pub group_id: u32,
+    pub prop_type: proto::FightPropType,
+    pub prop_value: f32,
+    //pub weight: u32, // TODO: removed in 2.5.0!
+    //pub upgrade_weight: u32, // TODO: removed in 2.5.0!
+}
\ No newline at end of file
diff --git a/src/jsonmanager/weapon.rs b/src/jsonmanager/weapon.rs
new file mode 100644
index 0000000..a43ab34
--- /dev/null
+++ b/src/jsonmanager/weapon.rs
@@ -0,0 +1,32 @@
+use serde::{Serialize, Deserialize};
+
+#[derive(Deserialize, Clone)]
+#[serde(rename_all="PascalCase")]
+pub struct WeaponProp {
+    pub r#type: proto::GrowCurveType,
+    // These two fields is missing sometimes
+    #[serde(default)]
+    pub init_value: f32,
+    #[serde(default)]
+    pub prop_type: proto::FightPropType,
+}
+
+#[derive(Deserialize, Clone)]
+#[serde(rename_all="PascalCase")]
+pub struct Weapon {
+    pub id: u32,
+
+    pub weapon_type: String, // TODO: that's an enum!
+    pub rank_level: u32,
+    pub skill_affix: Vec<u32>,
+    pub weapon_prop: Vec<WeaponProp>,
+    pub weapon_promote_id: u32,
+    pub story_id: Option<u32>,
+    pub awaken_costs: Vec<u32>,
+    #[serde(default)]
+    pub destroy_rule: String, // TODO: that's an enum!
+    pub destroy_return_material: Vec<u32>,
+    pub destroy_return_material_count: Vec<u32>,
+    pub weight: u32,
+    pub gadget_id: u32,
+}
\ No newline at end of file