diff --git a/labscore/cardstack/index.js b/labscore/cardstack/index.js
index e68835d..ddaaaf6 100644
--- a/labscore/cardstack/index.js
+++ b/labscore/cardstack/index.js
@@ -21,7 +21,7 @@ module.exports = {
    * @returns {DynamicCardStack}
    */
   createDynamicCardStack: (context, options)=>{
-    return new DynamicCardStack(context, options)
+    new DynamicCardStack(context, options);
   },
   CARD_STACK_CONSTANTS: require("./constants"),
 }
\ No newline at end of file
diff --git a/labscore/cardstack/stack.js b/labscore/cardstack/stack.js
index 97edd1e..27a2947 100644
--- a/labscore/cardstack/stack.js
+++ b/labscore/cardstack/stack.js
@@ -44,7 +44,7 @@ class DynamicCardStack {
    * @param {boolean} options.pageNumbers Renders Page Numbers in the footer of all embeds in cards.
    * @param {Function} options.pageNumberGenerator Function that renders a page number. Default style is `Page <index>/<total>`
    * @param {boolean} options.disableCloning Disables cloning a card stack when someone other than the author interacts with it.
-   * @param {boolean} options.ephemeral Makes the response ephemeral (primarily used by cloning)
+   * @param {boolean} options.flags Flags that should be used for the response message.
    */
   constructor(context, options) {
     this.context = context;
@@ -59,7 +59,7 @@ class DynamicCardStack {
     this.pageNumbers = options.pageNumbers || true;
     this.pageNumberGenerator = options.pageNumberGenerator || ((pg) => `Page ${pg.index + 1}/${pg.activeCardStack.length}`);
     this.disableCloning = options.disableCloning || false;
-    this.ephemeral = options.ephemeral || false;
+    this.flags = options.flags || 0;
 
     this.rootIndex = this.index;
     this.killed = false;
@@ -73,7 +73,7 @@ class DynamicCardStack {
     this.lastInteraction = Date.now();
     this.spawned = 0;
 
-    return this._spawn();
+    this._spawn();
   }
 
   /**
@@ -87,6 +87,7 @@ class DynamicCardStack {
 
     // Remove reference to free the cardstack for GC
     activeStacks.delete(this.context.message || this.context.interaction);
+    delete this;
   }
 
   /**
@@ -98,7 +99,7 @@ class DynamicCardStack {
     return setTimeout(async () => {
       // If we have an interaction within the expiry window
       // restart the expiry window with 30s
-      if((this.lastInteraction - this.spawned) >= 0){
+      if((this.lastInteraction - this.spawned) > 0){
         clearTimeout(this.timeout)
         this.spawned = Date.now();
         // New expiry time is 30 seconds
@@ -210,7 +211,7 @@ class DynamicCardStack {
       }
 
       // TODO: ensure flags don't get overwritten/allow supplying custom flags
-      if (this.ephemeral) card.flags = MessageFlags.EPHEMERAL;
+      card.flags = this.flags;
 
       return card;
     } catch (e) {
@@ -276,7 +277,7 @@ class DynamicCardStack {
         reference: true,
         allowedMentions: {parse: [], repliedUser: false},
         // TODO: allow supplying flags
-        flags: this.ephemeral ? MessageFlags.EPHEMERAL : 0
+        flags: this.flags
       })
     } catch (e) {
       console.error("Message editing failed:")