diff --git a/lua/client/client.lua b/lua/client/client.lua
index fdbeef95..41321537 100644
--- a/lua/client/client.lua
+++ b/lua/client/client.lua
@@ -466,6 +466,19 @@ fk.client_callback["MoveCards"] = function(jsonData)
   ClientInstance:notifyUI("MoveCards", json.encode(merged))
 end
 
+fk.client_callback["ShowCard"] = function(jsonData)
+  local data = json.decode(jsonData)
+  local from = data.from
+  local cards = data.cards
+  ClientInstance:notifyUI("MoveCards", json.encode{
+    {
+      ids = cards,
+      fromArea = Card.DrawPile,
+      toArea = Card.Processing,
+    }
+  })
+end
+
 fk.client_callback["LoseSkill"] = function(jsonData)
   -- jsonData: [ int player_id, string skill_name ]
   local data = json.decode(jsonData)
diff --git a/lua/client/client_util.lua b/lua/client/client_util.lua
index 68ef0aa6..8ea5cbc3 100644
--- a/lua/client/client_util.lua
+++ b/lua/client/client_util.lua
@@ -115,6 +115,10 @@ function GetCards(pack_name)
   return json.encode(ret)
 end
 
+function GetCardSpecialSkills(cid)
+  return json.encode(Fk:getCardById(cid).special_skills or {})
+end
+
 function DistanceTo(from, to)
   local a = ClientInstance:getPlayerById(from)
   local b = ClientInstance:getPlayerById(to)
diff --git a/lua/client/i18n/zh_CN.lua b/lua/client/i18n/zh_CN.lua
index 3e6c95a9..68aefc9c 100644
--- a/lua/client/i18n/zh_CN.lua
+++ b/lua/client/i18n/zh_CN.lua
@@ -127,6 +127,7 @@ FreeKill使用的是libgit2的C API，与此同时使用Git完成拓展包的下
   ["PlayCard"] = "出牌",
 
   ["AskForCardChosen"] = "选牌",
+  ["AskForCardsChosen"] = "选牌",
   ["#AskForChooseCard"] = "%1：请选择其一张卡牌",
   ["$ChooseCard"] = "请选择一张卡牌",
   ["$Hand"] = "手牌区",
@@ -202,6 +203,8 @@ Fk:loadTranslationTable{
   ["$InstallEquip"] = "%from 装备了 %card",
   ["$UninstallEquip"] = "%from 卸载了 %card",
 
+  ["#ShowCard"] = "%from 展示了牌 %card",
+
   -- phase
   ["#PhaseSkipped"] = "%from 跳过了 %arg",
   ["#GainAnExtraTurn"] = "%from 开始进行一个额外的回合",
diff --git a/lua/core/card.lua b/lua/core/card.lua
index 2cb014cb..bbb40cdd 100644
--- a/lua/core/card.lua
+++ b/lua/core/card.lua
@@ -11,6 +11,8 @@
 ---@field area CardArea
 ---@field subcards integer[]
 ---@field skillName string @ for virtual cards
+---@field skill Skill
+---@field special_skills string[] | nil
 local Card = class("Card")
 
 ---@alias Suit integer
@@ -88,6 +90,7 @@ end
 function Card:clone(suit, number)
   local newCard = self.class:new(self.name, suit, number)
   newCard.skill = self.skill
+  newCard.special_skills = self.special_skills
   newCard.equip_skill = self.equip_skill
   return newCard
 end
diff --git a/lua/fk_ex.lua b/lua/fk_ex.lua
index c7c0c3c3..f9af2cbc 100644
--- a/lua/fk_ex.lua
+++ b/lua/fk_ex.lua
@@ -344,6 +344,7 @@ function fk.CreateBasicCard(spec)
 
   local card = BasicCard:new(spec.name, spec.suit, spec.number)
   card.skill = spec.skill or defaultCardSkill
+  card.special_skills = spec.special_skills
   return card
 end
 
@@ -358,6 +359,7 @@ function fk.CreateTrickCard(spec)
 
   local card = TrickCard:new(spec.name, spec.suit, spec.number)
   card.skill = spec.skill or defaultCardSkill
+  card.special_skills = spec.special_skills
   return card
 end
 
@@ -372,6 +374,7 @@ function fk.CreateDelayedTrickCard(spec)
 
   local card = DelayedTrickCard:new(spec.name, spec.suit, spec.number)
   card.skill = spec.skill or defaultCardSkill
+  card.special_skills = spec.special_skills
   return card
 end
 
@@ -387,6 +390,7 @@ function fk.CreateWeapon(spec)
 
   local card = Weapon:new(spec.name, spec.suit, spec.number, spec.attack_range)
   card.skill = spec.skill or defaultCardSkill
+  card.special_skills = spec.special_skills
   card.equip_skill = spec.equip_skill
 
   if spec.on_install then card.onInstall = spec.on_install end
@@ -406,6 +410,7 @@ function fk.CreateArmor(spec)
   local card = Armor:new(spec.name, spec.suit, spec.number)
   card.skill = spec.skill or defaultCardSkill
   card.equip_skill = spec.equip_skill
+  card.special_skills = spec.special_skills
 
   if spec.on_install then card.onInstall = spec.on_install end
   if spec.on_uninstall then card.onUninstall = spec.on_uninstall end
@@ -423,6 +428,7 @@ function fk.CreateDefensiveRide(spec)
 
   local card = DefensiveRide:new(spec.name, spec.suit, spec.number)
   card.skill = spec.skill or defaultCardSkill
+  card.special_skills = spec.special_skills
   card.equip_skill = spec.equip_skill
 
   if spec.on_install then card.onInstall = spec.on_install end
@@ -441,6 +447,7 @@ function fk.CreateOffensiveRide(spec)
 
   local card = OffensiveRide:new(spec.name, spec.suit, spec.number)
   card.skill = spec.skill or defaultCardSkill
+  card.special_skills = spec.special_skills
   card.equip_skill = spec.equip_skill
 
   if spec.on_install then card.onInstall = spec.on_install end
@@ -459,6 +466,7 @@ function fk.CreateTreasure(spec)
 
   local card = Treasure:new(spec.name, spec.suit, spec.number)
   card.skill = spec.skill or defaultCardSkill
+  card.special_skills = spec.special_skills
   card.equip_skill = spec.equip_skill
 
   if spec.on_install then card.onInstall = spec.on_install end
diff --git a/lua/server/room.lua b/lua/server/room.lua
index 437e4e03..57110675 100644
--- a/lua/server/room.lua
+++ b/lua/server/room.lua
@@ -750,18 +750,21 @@ end
 ---@param maxNum integer
 ---@param includeEquip boolean
 ---@param skillName string
-function Room:askForDiscard(player, minNum, maxNum, includeEquip, skillName, cancelable)
+---@param pattern string
+function Room:askForDiscard(player, minNum, maxNum, includeEquip, skillName, cancelable, pattern)
   if minNum < 1 then
     return nil
   end
   cancelable = cancelable or false
+  pattern = pattern or ""
 
   local toDiscard = {}
   local data = {
     num = maxNum,
     min_num = minNum,
     include_equip = includeEquip,
-    reason = skillName
+    reason = skillName,
+    pattern = pattern,
   }
   local prompt = "#AskForDiscard:::" .. maxNum .. ":" .. minNum
   local _, ret = self:askForUseActiveSkill(player, "discard_skill", prompt, cancelable, data)
@@ -817,18 +820,21 @@ end
 ---@param includeEquip boolean
 ---@param skillName string
 ---@param cancelable boolean
-function Room:askForCard(player, minNum, maxNum, includeEquip, skillName, cancelable)
+---@param pattern string
+function Room:askForCard(player, minNum, maxNum, includeEquip, skillName, cancelable, pattern)
   if minNum < 1 then
     return nil
   end
   cancelable = cancelable or false
+  pattern = pattern or ""
 
   local chosenCards = {}
   local data = {
     num = maxNum,
     min_num = minNum,
     include_equip = includeEquip,
-    reason = skillName
+    reason = skillName,
+    pattern = pattern,
   }
   local prompt = "#askForCard:::" .. maxNum .. ":" .. minNum
   local _, ret = self:askForUseActiveSkill(player, "choose_cards_skill", prompt, cancelable, data)
@@ -1078,6 +1084,16 @@ function Room:handleUseCardReply(player, data)
       end
     end
   else
+    if data.special_skill then
+      local skill = Fk.skills[data.special_skill]
+      assert(skill:isInstanceOf(ActiveSkill))
+      skill:onUse(self, {
+        from = player.id,
+        cards = { card },
+        tos = targets,
+      })
+      return nil
+    end
     local use = {}    ---@type CardUseStruct
     use.from = player.id
     use.tos = {}
diff --git a/lua/server/serverplayer.lua b/lua/server/serverplayer.lua
index b34ae3c0..a08a3408 100644
--- a/lua/server/serverplayer.lua
+++ b/lua/server/serverplayer.lua
@@ -290,6 +290,20 @@ function ServerPlayer:turnOver()
   self.room.logic:trigger(fk.TurnedOver, self)
 end
 
+function ServerPlayer:showCards(cards)
+  cards = Card:getIdList(cards)
+  local room = self.room
+  room:sendLog{
+    type = "#ShowCard",
+    from = self.id,
+    card = cards,
+  }
+  room:doBroadcastNotify("ShowCard", json.encode{
+    from = self.id,
+    cards = cards,
+  })
+end
+
 ---@param from_phase Phase
 ---@param to_phase Phase
 function ServerPlayer:changePhase(from_phase, to_phase)
diff --git a/packages/maneuvering/init.lua b/packages/maneuvering/init.lua
index 9a68a3f9..99712dde 100644
--- a/packages/maneuvering/init.lua
+++ b/packages/maneuvering/init.lua
@@ -199,6 +199,8 @@ local ironChainCardSkill = fk.CreateActiveSkill{
 local ironChain = fk.CreateTrickCard{
   name = "iron_chain",
   skill = ironChainCardSkill,
+  -- FIXME! FIXME! FIXME!
+  special_skills = { "zhiheng" },
 }
 extension:addCards{
   ironChain:clone(Card.Spade, 11),
@@ -209,6 +211,45 @@ extension:addCards{
   ironChain:clone(Card.Club, 13),
 }
 
+local fireAttackSkill = fk.CreateActiveSkill{
+  name = "fire_attack_skill",
+  target_num = 1,
+  target_filter = function(self, to_select)
+    return not Fk:currentRoom():getPlayerById(to_select):isKongcheng()
+  end,
+  on_effect = function(self, room, cardEffectEvent)
+    local from = room:getPlayerById(cardEffectEvent.from)
+    local to = room:getPlayerById(cardEffectEvent.to)
+    if to:isKongcheng() then return end
+
+    local showCard = room:askForCard(to, 1, 1, false, self.name, false)[1]
+    to:showCards(showCard)
+
+    showCard = Fk:getCardById(showCard)
+    local cards = room:askForDiscard(from, 1, 1, false, self.name, true,
+                                    ".|.|" .. showCard:getSuitString())
+    if #cards > 0 then
+      room:damage({
+        from = from,
+        to = to,
+        card = cardEffectEvent.card,
+        damage = 1,
+        damageType = fk.FireDamage,
+        skillName = self.name
+      })
+    end
+  end,
+}
+local fireAttack = fk.CreateTrickCard{
+  name = "fire_attack",
+  skill = fireAttackSkill,
+}
+extension:addCards{
+  fireAttack:clone(Card.Heart, 2),
+  fireAttack:clone(Card.Heart, 3),
+  fireAttack:clone(Card.Diamond, 12),
+}
+
 local supplyShortageSkill = fk.CreateActiveSkill{
   name = "supply_shortage_skill",
   distance_limit = 1,
@@ -390,6 +431,9 @@ Fk:loadTranslationTable{
   ["fire__slash"] = "火杀",
   ["analeptic"] = "酒",
   ["iron_chain"] = "铁锁连环",
+  ["_normal_use"] = "正常使用",
+  ["recast"] = "重铸",
+  ["fire_attack"] = "火攻",
   ["supply_shortage"] = "兵粮寸断",
   ["guding_blade"] = "古锭刀",
   ["vine"] = "藤甲",
diff --git a/packages/standard/aux_skills.lua b/packages/standard/aux_skills.lua
index 29bc9ef5..ee4afebf 100644
--- a/packages/standard/aux_skills.lua
+++ b/packages/standard/aux_skills.lua
@@ -5,11 +5,15 @@ local discardSkill = fk.CreateActiveSkill{
       return false
     end
 
+    local checkpoint = true
     if not self.include_equip then
-      return Fk:currentRoom():getCardArea(to_select) ~= Player.Equip
+      checkpoint = checkpoint and (Fk:currentRoom():getCardArea(to_select) ~= Player.Equip)
     end
 
-    return true
+    if self.pattern ~= "" then
+      checkpoint = checkpoint and (Exppattern:Parse(self.pattern):match(Fk:getCardById(to_select)))
+    end
+    return checkpoint
   end,
   min_card_num = function(self) return self.min_num end,
   max_card_num = function(self) return self.num end,
@@ -17,17 +21,7 @@ local discardSkill = fk.CreateActiveSkill{
 
 local chooseCardsSkill = fk.CreateActiveSkill{
   name = "choose_cards_skill",
-  card_filter = function(self, to_select, selected)
-    if #selected >= self.num then
-      return false
-    end
-
-    if not self.include_equip then
-      return Fk:currentRoom():getCardArea(to_select) ~= Player.Equip
-    end
-
-    return true
-  end,
+  card_filter = discardSkill.cardFilter,
   min_card_num = function(self) return self.min_num end,
   max_card_num = function(self) return self.num end,
 }
diff --git a/packages/standard_cards/i18n/zh_CN.lua b/packages/standard_cards/i18n/zh_CN.lua
index a7c8739e..99909dac 100644
--- a/packages/standard_cards/i18n/zh_CN.lua
+++ b/packages/standard_cards/i18n/zh_CN.lua
@@ -41,6 +41,7 @@ Fk:loadTranslationTable{
   ["god_salvation"] = "桃园结义",
 
   ["amazing_grace"] = "五谷丰登",
+  ["amazing_grace_skill"] = "五谷选牌",
 
   ["lightning"] = "闪电",
 
diff --git a/qml/Pages/Room.qml b/qml/Pages/Room.qml
index 3f668e87..d75e2499 100644
--- a/qml/Pages/Room.qml
+++ b/qml/Pages/Room.qml
@@ -263,6 +263,14 @@ Item {
 
     onCardSelected: function(card) {
       Logic.enableTargets(card);
+
+      if (typeof card === "number" && card !== -1 && roomScene.state === "playing") {
+        let skills = JSON.parse(Backend.callLuaFunction("GetCardSpecialSkills", [card]));
+        skills.unshift("_normal_use");
+        specialCardSkills.model = skills;
+      } else {
+        specialCardSkills.model = [];
+      }
     }
   }
 
@@ -332,6 +340,41 @@ Item {
       }
     }
 
+    Rectangle {
+      anchors.bottom: parent.bottom
+      anchors.bottomMargin: 8
+      anchors.right: okCancel.left
+      anchors.rightMargin: 20
+      color: "#88EEEEEE"
+      radius: 8
+      visible: roomScene.state == "playing" && specialCardSkills.count > 1
+      width: childrenRect.width
+      height: childrenRect.height - 20
+
+      RowLayout {
+        y: -10
+        Repeater {
+          id: specialCardSkills
+          RadioButton {
+            property string orig_text: modelData
+            text: Backend.translate(modelData)
+            checked: index === 0
+            onCheckedChanged: {
+              if (modelData === "_normal_use") {
+                Logic.enableTargets(dashboard.selected_card);
+              } else {
+                Logic.enableTargets(JSON.stringify({
+                  skill: modelData,
+                  subcards: [dashboard.selected_card],
+                }));
+              }
+            }
+          }
+        }
+      }
+    }
+
+
     Row {
       id: okCancel
       anchors.bottom: parent.bottom
@@ -574,6 +617,17 @@ Item {
     onActivated: Logic.doCancelButton();
   }
 
+  function getCurrentCardUseMethod() {
+    for (let i = 1; i < specialCardSkills.count; i++) {
+      let item = specialCardSkills.itemAt(i);
+      if (item.checked) {
+        let ret = item.orig_text;
+        console.log(ret);
+        return ret;
+      }
+    }
+  }
+
   function addToChat(pid, raw, msg) {
     chat.append(msg);
     let photo = Logic.getPhotoOrSelf(pid);
diff --git a/qml/Pages/RoomElement/ChoiceBox.qml b/qml/Pages/RoomElement/ChoiceBox.qml
index 4aed7af1..5593ca3c 100644
--- a/qml/Pages/RoomElement/ChoiceBox.qml
+++ b/qml/Pages/RoomElement/ChoiceBox.qml
@@ -1,4 +1,5 @@
 import QtQuick
+import QtQuick.Layouts
 import ".."
 
 GraphicsBox {
@@ -11,18 +12,20 @@ GraphicsBox {
   width: Math.max(140, body.width + 20)
   height: body.height + title.height + 20
 
-  Column {
+  GridLayout {
     id: body
     x: 10
     y: title.height + 5
-    spacing: 10
+    flow: GridLayout.TopToBottom
+    rows: 8
+    columnSpacing: 10
 
     Repeater {
       model: options
 
       MetroButton {
+        Layout.fillWidth: true
         text: Backend.translate(modelData)
-        anchors.horizontalCenter: parent.horizontalCenter
 
         onClicked: {
           result = index;
diff --git a/qml/Pages/RoomLogic.js b/qml/Pages/RoomLogic.js
index 0de2c752..879c8bf9 100644
--- a/qml/Pages/RoomLogic.js
+++ b/qml/Pages/RoomLogic.js
@@ -68,7 +68,8 @@ function doOkButton() {
     replyToServer(JSON.stringify(
       {
         card: dashboard.getSelectedCard(),
-        targets: selected_targets
+        targets: selected_targets,
+        special_skill: roomScene.getCurrentCardUseMethod(),
       }
     ));
     return;