diff --git a/server/interaction.py b/server/interaction.py
index cbd8d2ba..157e4c25 100644
--- a/server/interaction.py
+++ b/server/interaction.py
@@ -1,5 +1,5 @@
 from utils import BaseModel
-from typing import Literal, List
+from typing import Literal, List, Any
 from enum import Enum
 from .consts import DieColor
 from .struct import DiceCost, CardActionTarget
@@ -136,7 +136,7 @@ def player_id(self) -> int:
         """
         return self.request.player_id
 
-    def is_valid(self) -> bool:
+    def is_valid(self, match: Any) -> bool:
         """
         Check whether the response is valid.
         """
@@ -151,8 +151,7 @@ class SwitchCardResponse(ResponseBase):
     request: SwitchCardRequest
     card_ids: List[int]
 
-    @property
-    def is_valid(self) -> bool:
+    def is_valid(self, match: Any) -> bool:
         if len(self.card_ids) > self.request.maximum_switch_number:
             return False
         if len(set(self.card_ids)) != len(self.card_ids):
@@ -175,8 +174,7 @@ class ChooseCharactorResponse(ResponseBase):
     request: ChooseCharactorRequest
     charactor_id: int
 
-    @property
-    def is_valid(self) -> bool:
+    def is_valid(self, match: Any) -> bool:
         return self.charactor_id in self.request.available_charactor_ids
 
 
@@ -185,8 +183,7 @@ class RerollDiceResponse(ResponseBase):
     request: RerollDiceRequest
     reroll_dice_ids: List[int]
 
-    @property
-    def is_valid(self) -> bool:
+    def is_valid(self, match: Any) -> bool:
         """
         if have duplicate dice ids, or dice ids out of range, return False.
         """
@@ -206,8 +203,7 @@ class SwitchCharactorResponse(ResponseBase):
     charactor_id: int
     cost_ids: List[int]
 
-    @property
-    def is_valid(self) -> bool:
+    def is_valid(self, match: Any) -> bool:
         """
         Charactor is in the candidate charactors.
         Cost matches the request.
@@ -224,8 +220,7 @@ class ElementalTuningResponse(ResponseBase):
     cost_id: int
     card_id: int
 
-    @property
-    def is_valid(self) -> bool:
+    def is_valid(self, match: Any) -> bool:
         """
         Check whether the response is valid.
         """
@@ -246,8 +241,7 @@ class UseSkillResponse(ResponseBase):
     cost_ids: List[int]
     # TODO: choose target
 
-    @property
-    def is_valid(self) -> bool:
+    def is_valid(self, match: Any) -> bool:
         """
         Check whether the response is valid.
         """
@@ -262,8 +256,7 @@ class UseCardResponse(ResponseBase):
     target: CardActionTarget | None
     # TODO: choose target
 
-    @property
-    def is_valid(self) -> bool:
+    def is_valid(self, match: Any) -> bool:
         """
         Check whether the response is valid.
         """
diff --git a/server/match.py b/server/match.py
index bed289f1..9c62357f 100644
--- a/server/match.py
+++ b/server/match.py
@@ -471,7 +471,7 @@ def respond(self, response: Responses) -> bool:
             logging.error('Match is not waiting for response.')
             return False
         # check if the response is valid
-        if not response.is_valid:
+        if not response.is_valid(self):
             logging.error('Response is not valid.')
             return False
         # check if the request exist
@@ -895,7 +895,7 @@ def _request_use_skill(self, player_id: int):
             # stunned, cannot use skill.
             return
         for sid, skill in enumerate(front_charactor.skills):
-            if skill.is_valid(front_charactor.hp, front_charactor.charge):
+            if skill.is_valid(self):
                 cost = skill.cost.copy(deep = True)
                 cost_value = DiceCostValue(
                     cost = cost,
@@ -931,7 +931,7 @@ def _request_use_card(self, player_id: int):
         table = self.player_tables[player_id]
         cards = table.hands
         for cid, card in enumerate(cards):
-            if card.is_valid():
+            if card.is_valid(self):
                 cost = card.cost.copy(deep = True)
                 cost_value = DiceCostValue(
                     cost = cost,
diff --git a/server/object_base.py b/server/object_base.py
index 3af9b4bb..a539c4ab 100644
--- a/server/object_base.py
+++ b/server/object_base.py
@@ -90,7 +90,7 @@ def __init__(self, *argv, **kwargs):
         if self.cost.original_value is not None:
             self.cost.original_value.label = self.cost_label
 
-    def is_valid(self, hp: int, charge: int) -> bool:
+    def is_valid(self, match: Any) -> bool:
         """
         Check if the skill can be used.
         """
@@ -222,11 +222,13 @@ def __init__(self, *argv, **kwargs):
             'XXX', self.damage_type.value.lower().capitalize())
         self.desc = self.desc.replace('%d', str(self.damage))
 
-    def is_valid(self, hp: int, charge: int) -> bool:
+    def is_valid(self, match: Any) -> bool:
         """
         Check if the skill can be used.
         """
-        return self.charge <= charge
+        table = match.player_tables[self.position.player_id]
+        charactor = table.charactors[self.position.charactor_id]
+        return self.charge <= charactor.charge
 
     def get_actions(self, match: Any) -> List[Actions]:
         """
@@ -291,7 +293,7 @@ def get_actions(
         """
         raise NotImplementedError()
 
-    def is_valid(self) -> bool:
+    def is_valid(self, match: Any) -> bool:
         """
         Check if the card can be used. Note that this function will not check
         the cost of the card.