diff --git a/server/gameserver/ability.cc b/server/gameserver/ability.cc
index 872174bc..30c63f80 100644
--- a/server/gameserver/ability.cc
+++ b/server/gameserver/ability.cc
@@ -473,42 +473,92 @@ float Ability::GetFixedSped()
 
 AttrAbsHandle Ability::AddAttrAbs(int attr_id, float value)
 {
-
+    if (IsValidHumanAttr(attr_id)) {
+        auto p = new AttrAbs(attr_id, value);
+        list_add_tail(&p->entry, &std::get<1>(attr_abs_[attr_id]));
+        RecalcAttrAbs(attr_id);
+        return p->ptr;
+    }
+    return AttrAbsHandle();
 }
 
 void Ability::RemoveAttrAbs(AttrAbsHandle handle)
 {
-
+    if (!handle.expired()) {
+        auto p = handle.lock();
+        list_del_init(&p->data->entry);
+        RecalcAttrAbs(p->data->attr_id);
+        delete p->data;
+    }
 }
 
 AttrRateHandle Ability::AddAttrRate(int attr_id, float value)
 {
-
+    if (IsValidHumanAttr(attr_id)) {
+        auto p = new AttrRate(attr_id, value);
+        list_add_tail(&p->entry, &std::get<1>(attr_abs_[attr_id]));
+        RecalcAttrRate(attr_id);
+        return p->ptr;
+    }
+    return AttrRateHandle();
 }
 
 void Ability::RemoveAttrRate(AttrAbsHandle handle)
 {
-
+    if (!handle.expired()) {
+        auto p = handle.lock();
+        list_del_init(&p->data->entry);
+        RecalcAttrRate(p->data->attr_id);
+        delete p->data;
+    }
 }
 
 void Ability::RecalcAttrAbs(int attr_id)
 {
-
+    list_head* head = &std::get<1>(attr_abs_[attr_id]);
+    list_head* pos = nullptr;
+    list_head* next = nullptr;
+    float new_val = 0.0f;
+    list_for_each_safe(pos, next, head) {
+        AttrAbs* e = list_entry(pos,
+                                AttrAbs,
+                                entry);
+        new_val += e->value;
+    }
+    std::get<0>(attr_abs_[attr_id]) = new_val;
 }
 
 void Ability::RecalcAttrRate(int attr_id)
 {
-
+    list_head* head = &std::get<1>(attr_rate_[attr_id]);
+    list_head* pos = nullptr;
+    list_head* next = nullptr;
+    float new_val = 0.0f;
+    list_for_each_safe(pos, next, head) {
+        AttrRate* e = list_entry(pos,
+                                 AttrRate,
+                                 entry);
+        new_val += e->value;
+    }
+    std::get<0>(attr_rate_[attr_id]) = new_val;
 }
 
 float Ability::GetAttrAbs(int attr_id)
 {
-    return 0.0f;
+    if (IsValidHumanAttr(attr_id)) {
+        return std::get<0>(attr_abs_[attr_id]);
+    } else {
+        return 0.0f;
+    }
 }
 
 float Ability::GetAttrRate(int attr_id)
 {
-    return 0.0f;
+    if (IsValidHumanAttr(attr_id)) {
+        return std::get<0>(attr_rate_[attr_id]);
+    } else {
+        return 0.0f;
+    }
 }
 
 AttrAdditionHandle Ability::AddAttr(int attr_id, float rate)