diff --git a/packages/entity/src/behavior-components/expression.jsx b/packages/entity/src/behavior-components/expression.jsx
index 1185af2..a620c18 100644
--- a/packages/entity/src/behavior-components/expression.jsx
+++ b/packages/entity/src/behavior-components/expression.jsx
@@ -15,9 +15,10 @@ import Variant from './variant';
 
 const Expression = ({
   context,
-  value,
   path,
   type,
+  value,
+  vararg,
 }) => {
   const latus = useLatus();
   const patch = useJsonPatcher();
@@ -60,7 +61,6 @@ const Expression = ({
     if (isKey(op)) {
       const isFirst = 0 === i;
       const isLast = i === ops.length - 1 ? true : isInvocation(ops[i + 1]);
-      const isUndefined = 'undefined' === description.type || 'undefined' === type;
       Renderables.push(
         <Key
           childrenDescription={{
@@ -72,7 +72,7 @@ const Expression = ({
                 : {}
             ),
             ...(
-              isUndefined || (isLast && !isFirst)
+              vararg || (isLast && !isFirst)
                 ? {'.': {label: '', type: description.type}}
                 : {}
             ),
@@ -94,7 +94,7 @@ const Expression = ({
               const parts = localPath.split('/');
               parts.pop();
               parts.pop();
-              if (isUndefined) {
+              if (vararg) {
                 parts.pop();
                 patch({
                   op: 'remove',
@@ -297,8 +297,8 @@ const Expression = ({
     <div
       className={classnames(
         'expression',
-        {'wrong-type': realType !== type},
-        {'undefined-type': 'undefined' === realType},
+        {'wrong-type': 'any' !== type && 'undefined' !== type && realType !== type},
+        {'undefined-type': 'any' !== type && 'undefined' === realType},
       )}
     >
       {Renderables}
@@ -306,7 +306,9 @@ const Expression = ({
   );
 };
 
-Expression.defaultProps = {};
+Expression.defaultProps = {
+  vararg: false,
+};
 
 Expression.displayName = 'Expression';
 
@@ -327,6 +329,7 @@ Expression.propTypes = {
     // eslint-disable-next-line react/forbid-prop-types
     value: PropTypes.any,
   }).isRequired,
+  vararg: PropTypes.bool,
   path: PropTypes.string.isRequired,
   type: PropTypes.string.isRequired,
 };
diff --git a/packages/entity/src/behavior-components/expression/invocation.jsx b/packages/entity/src/behavior-components/expression/invocation.jsx
index a881c1b..0c599d0 100644
--- a/packages/entity/src/behavior-components/expression/invocation.jsx
+++ b/packages/entity/src/behavior-components/expression/invocation.jsx
@@ -58,8 +58,9 @@ const Invocation = ({
         />
       );
     }
-    const options = description?.args?.[i].options;
-    const type = description?.args?.[i].type || 'undefined';
+    const j = description.vararg ? Math.min(description?.args?.length - 1, i) : i;
+    const options = description?.args?.[j].options;
+    const type = description?.args?.[j].type || 'undefined';
     return (
       <Variant
         context={context}
@@ -68,10 +69,14 @@ const Invocation = ({
         path={argPath}
         type={type}
         value={arg}
+        vararg={
+          'undefined' === type
+          || (description.vararg && j === description?.args?.length - 1)
+        }
       />
     );
   };
-  const isVarArg = 'undefined' === description.type;
+  const isVarArg = 'undefined' === description.type || description.vararg;
   const args = op.args.concat();
   if (isVarArg) {
     args.push({type: 'undefined'});
@@ -108,6 +113,7 @@ Invocation.propTypes = {
       }),
     ),
     type: PropTypes.string,
+    vararg: PropTypes.bool,
   }).isRequired,
   onChange: PropTypes.func.isRequired,
   op: PropTypes.shape({