diff --git a/server/gameserver/lispenv.cc b/server/gameserver/lispenv.cc
index 88e925a8..57de237e 100644
--- a/server/gameserver/lispenv.cc
+++ b/server/gameserver/lispenv.cc
@@ -16,12 +16,12 @@ public:
              "getSkillNumber",
              [this] (const a8::lisp::List& params) -> std::shared_ptr<a8::lisp::Value>
              {
-                 a8::lisp::Atom result;
+                 double result = 0;
                  if (params->size() != 1) {
                      abort();
                  }
-                 result.val = context_.skill_meta->_number_meta->_float_speed;
-                 return std::make_shared<a8::lisp::Value>(result);
+                 result = context_.skill_meta->_number_meta->_float_speed;
+                 return std::make_shared<a8::lisp::Value>(a8::lisp::Atom(result));
              });
     }
 
@@ -32,8 +32,19 @@ public:
         context_.c = c;
         context_.skill_meta = skill_meta;
 
+        auto result = a8::lisp::Expr::Eval(expr, shared_from_this());
+
         context_.c = nullptr;
         context_.skill_meta = nullptr;
+
+        if (!result) {
+            abort();
+        }
+        if (!result->IsType(a8::lisp::ValueType::kAtom)) {
+            abort();
+        }
+        auto&& atom = std::any_cast<a8::lisp::Atom>(result->value);
+        return atom.val;
     }
 
     std::shared_ptr<a8::lisp::Value> Compile(const std::string& script)
@@ -58,6 +69,18 @@ public:
                 abort();
             }
             auto func_call_exprs = std::make_shared<a8::lisp::List::element_type>();
+            {
+                auto cproc = Find("getSkillNumber");
+                if (!cproc) {
+                    abort();
+                }
+                if (!cproc->IsType(a8::lisp::ValueType::kCProc)) {
+                    abort();
+                }
+                func_call_exprs->push_back(cproc);
+                func_call_exprs->push_back
+                    (std::make_shared<a8::lisp::Value>(a8::lisp::Atom(idx)));
+            }
             node->Assign(func_call_exprs);
 
         } else if (node->IsType(a8::lisp::ValueType::kList)) {
@@ -79,7 +102,8 @@ private:
 
 void LispEnv::Init()
 {
-
+    skill_env_ = std::make_shared<SkillScope>();
+    skill_env_->Init();
 }
 
 void LispEnv::UnInit()
diff --git a/server/gameserver/mt/SkillNumber.cc b/server/gameserver/mt/SkillNumber.cc
index a96cecec..b268e9d0 100644
--- a/server/gameserver/mt/SkillNumber.cc
+++ b/server/gameserver/mt/SkillNumber.cc
@@ -112,7 +112,10 @@ namespace mt
 
     int SkillNumber::GetAttrIdxByName(const std::string& name)
     {
-
+        if (name == "${skillNumber.speed}") {
+            return 0;
+        }
+        return -1;
     }
 
 }
diff --git a/third_party/a8 b/third_party/a8
index b075c000..24625f05 160000
--- a/third_party/a8
+++ b/third_party/a8
@@ -1 +1 @@
-Subproject commit b075c000c2c52a674bb7c27a398dc3a795b40d8f
+Subproject commit 24625f05d1636709680b03de74b60d2b4736d7d5