Profane Memento: Trigger on Card, not Permanent

lib/magic/cards/profane_memento.rb

@@ -5,16 +5,20 @@ class ProfaneMemento < Card
       COST = { any: 1 }
       TYPE_LINE = "Artifact"
 
+      class PermanentEnteredZoneTrigger < TriggeredAbility::Base
+        def should_perform?
+          event.to.graveyard? && event.card.creature? && event.card.controller != controller
+        end
+
+        def call
+          actor.trigger_effect(:gain_life, life: 1)
+        end
+      end
+
       def event_handlers
         {
           # Whenever a creature card is put into an opponent’s graveyard from anywhere, you gain 1 life.
-          Events::PermanentEnteredZone => -> (receiver, event) do
-            return unless event.to.graveyard?
-            return if event.permanent.controller?(receiver.controller)
-            return unless event.permanent.creature?
-
-            receiver.trigger_effect(:gain_life, life: 1)
-          end
+          Events::CardEnteredZone => PermanentEnteredZoneTrigger
         }
       end
     end

spec/cards/profane_memento_spec.rb

@@ -7,9 +7,9 @@
 
   context "receive notification" do
     context "when creature enters controller's graveyard" do
-      let(:p1_creature) { ResolvePermanent("Loxodon Wayfarer", owner: p1) }
+      let(:p1_creature) { Card("Loxodon Wayfarer", owner: p1) }
       let(:event) do
-        Magic::Events::PermanentEnteredZone.new(
+        Magic::Events::CardEnteredZone.new(
           p1_creature,
           from: game.battlefield,
           to: p1.graveyard
@@ -22,9 +22,9 @@
     end
 
     context "when a creature enters opponent's graveyard" do
-      let(:p2_creature) { ResolvePermanent("Loxodon Wayfarer", owner: p2) }
+      let(:p2_creature) { Card("Loxodon Wayfarer", owner: p2) }
       let(:event) do
-        Magic::Events::PermanentEnteredZone.new(
+        Magic::Events::CardEnteredZone.new(
           p2_creature,
           from: game.battlefield,
           to: p2.graveyard,
@@ -37,9 +37,9 @@
     end
 
     context "when an artifact enters opponent's graveyard" do
-      let(:p2_artifact) { ResolvePermanent("Profane Memento", owner: p2) }
+      let(:p2_artifact) { Card("Profane Memento", owner: p2) }
       let(:event) do
-        Magic::Events::PermanentEnteredZone.new(
+        Magic::Events::CardEnteredZone.new(
           p2_artifact,
           from: game.battlefield,
           to: p2.graveyard,