diff --git a/lua/client/client_util.lua b/lua/client/client_util.lua
index b749da6d..c3f699da 100644
--- a/lua/client/client_util.lua
+++ b/lua/client/client_util.lua
@@ -262,6 +262,7 @@ end
 
 function GetSkillData(skill_name)
   local skill = Fk.skills[skill_name]
+  if not skill then return "null" end
   local freq = "notactive"
   if skill:isInstanceOf(ActiveSkill) or skill:isInstanceOf(ViewAsSkill) then
     freq = "active"
diff --git a/lua/core/player.lua b/lua/core/player.lua
index 035f9fae..e5c1b47e 100644
--- a/lua/core/player.lua
+++ b/lua/core/player.lua
@@ -356,6 +356,12 @@ function Player:getAttackRange()
   local weapon = Fk:getCardById(self:getEquipment(Card.SubtypeWeapon))
   local baseAttackRange = math.max(weapon and weapon.attack_range or 1, 0)
 
+  local status_skills = Fk:currentRoom().status_skills[AttackRangeSkill] or {}
+  for _, skill in ipairs(status_skills) do
+    local correct = skill:getCorrect(self, other)
+    baseAttackRange = baseAttackRange + correct
+  end
+
   return math.max(baseAttackRange, 0)
 end
 
@@ -410,11 +416,6 @@ function Player:inMyAttackRange(other)
     return false
   end
   local baseAttackRange = self:getAttackRange()
-  local status_skills = Fk:currentRoom().status_skills[AttackRangeSkill] or {}
-  for _, skill in ipairs(status_skills) do
-    local correct = skill:getCorrect(self, other)
-    baseAttackRange = baseAttackRange + correct
-  end
   return self:distanceTo(other) <= baseAttackRange
 end
 
diff --git a/lua/core/skill_type/active.lua b/lua/core/skill_type/active.lua
index 4b5243b2..4c08bdb0 100644
--- a/lua/core/skill_type/active.lua
+++ b/lua/core/skill_type/active.lua
@@ -120,7 +120,7 @@ function ActiveSkill:getMaxCardNum()
 end
 
 function ActiveSkill:getDistanceLimit(player, card)
-  local ret = self.distance_limit
+  local ret = self.distance_limit or 0
   local status_skills = Fk:currentRoom().status_skills[TargetModSkill] or {}
   for _, skill in ipairs(status_skills) do
     local correct = skill:getDistanceLimit(player, self, card)
diff --git a/lua/server/room.lua b/lua/server/room.lua
index 8c0bf245..c0808bd9 100644
--- a/lua/server/room.lua
+++ b/lua/server/room.lua
@@ -898,7 +898,7 @@ function Room:askForDiscard(player, minNum, maxNum, includeEquip, skillName, can
   minNum = math.min(#canDiscards, minNum)
 
   if minNum < 1 then
-    return nil
+    return {}
   end
 
   local toDiscard = {}
diff --git a/packages/standard_cards/init.lua b/packages/standard_cards/init.lua
index b3fb0963..3ceacc32 100644
--- a/packages/standard_cards/init.lua
+++ b/packages/standard_cards/init.lua
@@ -13,7 +13,10 @@ local slashSkill = fk.CreateActiveSkill{
   target_filter = function(self, to_select, selected, _, card)
     if #selected < self:getMaxTargetNum(Self, card) then
       local player = Fk:currentRoom():getPlayerById(to_select)
-      return Self ~= player and Self:inMyAttackRange(player)
+      return Self ~= player and
+        (self:getDistanceLimit(Self, card) -- for no distance limit for slash
+        + Self:getAttackRange()
+        >= Self:distanceTo(player))
     end
   end,
   on_effect = function(self, room, effect)
diff --git a/qml/Logic.js b/qml/Logic.js
index 105887fe..3c3992e6 100644
--- a/qml/Logic.js
+++ b/qml/Logic.js
@@ -121,6 +121,7 @@ callbacks["Chat"] = function(jsonData) {
   let general = Backend.translate(data.general);
   let time = data.time;
   let msg = data.msg;
+
   if (general === "")
     current.addToChat(pid, data, `[${time}] ${userName}: ${msg}`);
   else
diff --git a/qml/Pages/Lobby.qml b/qml/Pages/Lobby.qml
index 424c6cf4..a9305a54 100644
--- a/qml/Pages/Lobby.qml
+++ b/qml/Pages/Lobby.qml
@@ -57,6 +57,7 @@ Item {
 
         Text {
           text: Backend.translate("Observe")
+          visible: false // FIXME
           font.pixelSize: 24
           TapHandler {
             onTapped: {
diff --git a/qml/Pages/Room.qml b/qml/Pages/Room.qml
index f7010245..cb1c6b34 100644
--- a/qml/Pages/Room.qml
+++ b/qml/Pages/Room.qml
@@ -673,6 +673,10 @@ Item {
 
   function addToChat(pid, raw, msg) {
     if (raw.type === 1) return;
+
+    if (raw.msg.startsWith("$")) {
+      if (specialChat(pid, data, raw.msg.slice(1))) return;
+    }
     chat.append(msg);
     let photo = Logic.getPhotoOrSelf(pid);
     if (photo === undefined)
@@ -680,6 +684,73 @@ Item {
     photo.chat(raw.msg);
   }
 
+  function specialChat(pid, data, msg) {
+    // skill audio: %s%d
+    // death audio: ~%s
+    // something special: .%s:...
+
+    let time = data.time;
+    let userName = data.userName;
+    let general = Backend.translate(data.general);
+
+    if (msg.startsWith(".")) {
+      let splited = msg.split(":");
+      let type = splited[0].slice(1);
+      switch (type) {
+        case "egg": {
+          return true;
+        }
+        case "flower": {
+          return true;
+        }
+        default:
+          return false;
+      }
+    } else if (msg.startsWith("~")) {
+      let g = msg.slice(1);
+      let extension = JSON.parse(Backend.callLuaFunction("GetGeneralData", [g])).extension;
+      Backend.playSound("./packages/" + extension + "/audio/death/" + g);
+
+      let m = Backend.translate("~" + g);
+      if (general === "")
+        chat.append(`[${time}] ${userName}: ${m}`);
+      else
+        chat.append(`[${time}] ${userName}(${general}): ${m}`);
+
+      let photo = Logic.getPhotoOrSelf(pid);
+      if (photo === undefined)
+        return true;
+      photo.chat(m);
+
+      return true;
+    } else {
+      let splited = msg.split(":");
+      if (splited.length < 2) return false;
+      let skill = splited[0];
+      let idx = parseInt(splited[1]);
+
+      let data2 = JSON.parse(Backend.callLuaFunction("GetSkillData", [skill]));
+      if (!data2) return false;
+      let extension = data2.extension;
+      Backend.playSound("./packages/" + extension + "/audio/skill/" + skill, idx);
+
+      let m = Backend.translate("$" + skill + idx.toString());
+      if (general === "")
+        chat.append(`[${time}] ${userName}: ${m}`);
+      else
+        chat.append(`[${time}] ${userName}(${general}): ${m}`);
+
+      let photo = Logic.getPhotoOrSelf(pid);
+      if (photo === undefined)
+        return true;
+      photo.chat(m);
+
+      return true;
+    }
+
+    return false;
+  }
+
   function addToLog(msg) {
     log.append(msg);
   }