Acidic Slime's target must be chosen on cast

lib/magic/cards/acidic_slime.rb

@@ -1,20 +1,19 @@
 module Magic
   module Cards
-    AcidicSlime = Creature("Acidic Slime") do
+    class AcidicSlime < Creature
+      card_name "Acidic Slime"
       cost generic: 3, green: 2
-      creature_type("Ooze")
+      creature_type "Ooze"
       keywords :deathtouch
       power 2
       toughness 2
 
-      enters_the_battlefield do
-        game.choices.add(AcidicSlime::Choice.new(actor: actor))
+      def target_choices
+        game.battlefield.cards.by_any_type("Artifact", "Enchantment", "Land")
       end
-    end
 
-    class AcidicSlime < Creature
-      class Choice < Choice::DestroyTarget
-        def choices = game.battlefield.cards.by_any_type("Artifact", "Enchantment", "Land")
+      def resolve!(target:)
+        trigger_effect(:destroy_target, target: target)
       end
     end
   end

spec/cards/acidic_slime_spec.rb

@@ -22,11 +22,15 @@
     end
 
     it "triggers a destroy effect" do
-      cast_and_resolve(card: subject, player: p1)
-      effect = game.choices.first
+      p1.add_mana(green: 5)
+      p1.cast(card: subject) do
+        _1.auto_pay_mana
+        _1.targeting(land)
+      end
 
-      expect(effect).to be_a(Magic::Choice::DestroyTarget)
-      expect(effect.choices).to match_array([land, enchantment, artifact])
+      game.tick!
+
+      expect(land.card.zone).to be_graveyard
     end
   end
 end