Add test for flickering Animate Dead

Mage.Sets/src/mage/cards/a/AnimateDead.java

@@ -31,6 +31,10 @@ public final class AnimateDead extends CardImpl {
         this.getSpellAbility().addEffect(new AttachEffect(Outcome.PutCreatureInPlay));
         this.addAbility(new EnchantAbility(auraTarget.getTargetName()));
 
+        // When Animate Dead enters the battlefield, if it's on the battlefield, it loses "enchant creature
+        // card in a graveyard" and gains "enchant creature put onto the battlefield with Animate Dead."
+        // Return enchanted creature card to the battlefield under your control and attach Animate Dead
+        // to it. When Animate Dead leaves the battlefield, that creature's controller sacrifices it.
         this.addAbility(new AnimateDeadTriggeredAbility());
 
         // Enchanted creature gets -1/-0.

Mage.Sets/src/mage/cards/d/DanceOfTheDead.java

@@ -44,6 +44,10 @@ public final class DanceOfTheDead extends CardImpl {
         this.getSpellAbility().addEffect(new AttachEffect(Outcome.PutCreatureInPlay));
         this.addAbility(new EnchantAbility(auraTarget.getTargetName()));
 
+        // When Dance of the Dead enters the battlefield, if it's on the battlefield, it loses "enchant creature
+        // card in a graveyard" and gains "enchant creature put onto the battlefield with Dance of the Dead."
+        // Put enchanted creature card onto the battlefield tapped under your control and attach Dance of the Dead
+        // to it. When Dance of the Dead leaves the battlefield, that creature's controller sacrifices it.
         this.addAbility(new AnimateDeadTriggeredAbility(false, true));
 
         // Enchanted creature gets +1/+1 and doesn't untap during its controller's untap step.

Mage.Sets/src/mage/cards/n/Necromancy.java

@@ -20,15 +20,20 @@ import java.util.UUID;
  */
 public final class Necromancy extends CardImpl {
 
-    private static final FilterCreatureCard filter = new FilterCreatureCard("creature card in a graveyard");
+    private static final FilterCreatureCard filter = new FilterCreatureCard("creature card from a graveyard");
 
     public Necromancy(UUID ownerId, CardSetInfo setInfo) {
         super(ownerId, setInfo, new CardType[]{CardType.ENCHANTMENT}, "{2}{B}");
 
-        // You may cast Necromancy as though it had flash. If you cast it any time a sorcery couldn't have been cast, the controller of the permanent it becomes sacrifices it at the beginning of the next cleanup step.
+        // You may cast Necromancy as though it had flash. If you cast it any time a sorcery couldn't have been cast,
+        // the controller of the permanent it becomes sacrifices it at the beginning of the next cleanup step.
         this.addAbility(new SimpleStaticAbility(Zone.ALL, new CastAsThoughItHadFlashSourceEffect(Duration.EndOfGame)));
         this.addAbility(new SacrificeIfCastAtInstantTimeTriggeredAbility());
 
+        // When Necromancy enters the battlefield, if it's on the battlefield, it becomes an Aura with
+        // "enchant creature put onto the battlefield with Necromancy." Put target creature card from
+        // a graveyard onto the battlefield under your control and attach Necromancy to it. When Necromancy
+        // leaves the battlefield, that creature's controller sacrifices it.
         Ability ability = new AnimateDeadTriggeredAbility(true);
         ability.addTarget(new TargetCardInGraveyard(filter));
         this.addAbility(ability);

Mage.Tests/src/test/java/org/mage/test/cards/enchantments/AnimateDeadTest.java

@@ -217,4 +217,67 @@ public class AnimateDeadTest extends CardTestPlayerBase {
         assertPowerToughness(playerA, "Blackbloom Rogue", 1, 3);
         assertPermanentCount(playerA, "Animate Dead", 1);
     }
+
+    /**
+     * Flickering Animate Dead, resolving enters trigger first
+     * https://github.com/magefree/mage/issues/5250
+     */
+    @Test
+    public void testFlickerAnimateDeadEnterTriggerFirst() {
+        addCard(Zone.GRAVEYARD, playerA, "Silvercoat Lion");
+        addCard(Zone.GRAVEYARD, playerA, "Walking Corpse");
+        addCard(Zone.BATTLEFIELD, playerA, "Plains", 2);
+        addCard(Zone.BATTLEFIELD, playerA, "Swamp", 2);
+        addCard(Zone.HAND, playerA, "Animate Dead");
+        addCard(Zone.HAND, playerA, "Flicker of Fate");
+
+        setStrictChooseMode(true);
+
+        castSpell(1, PhaseStep.PRECOMBAT_MAIN, playerA, "Animate Dead", "Silvercoat Lion");
+
+        castSpell(1, PhaseStep.BEGIN_COMBAT, playerA, "Flicker of Fate", "Animate Dead");
+        setChoice(playerA, "Walking Corpse");     // card to attach reentering aura to
+        setChoice(playerA, "When {this} leaves"); // resolve leaves trigger last
+
+        setStopAt(1, PhaseStep.END_TURN);
+        execute();
+
+        assertPermanentCount(playerA, "Animate Dead", 1);
+        assertPermanentCount(playerA, "Walking Corpse", 1);
+        assertPermanentCount(playerA, "Silvercoat Lion", 0);
+        assertGraveyardCount(playerA, "Silvercoat Lion", 1);
+        assertGraveyardCount(playerA, "Walking Corpse", 0);
+        assertGraveyardCount(playerA, "Flicker of Fate", 1);
+    }
+
+    /**
+     * Flickering Animate Dead, resolving leaves trigger first
+     */
+    @Test
+    public void testFlickerAnimateDeadLeaveTriggerFirst() {
+        addCard(Zone.GRAVEYARD, playerA, "Silvercoat Lion");
+        addCard(Zone.GRAVEYARD, playerA, "Walking Corpse");
+        addCard(Zone.BATTLEFIELD, playerA, "Plains", 2);
+        addCard(Zone.BATTLEFIELD, playerA, "Swamp", 2);
+        addCard(Zone.HAND, playerA, "Animate Dead");
+        addCard(Zone.HAND, playerA, "Flicker of Fate");
+
+        setStrictChooseMode(true);
+
+        castSpell(1, PhaseStep.PRECOMBAT_MAIN, playerA, "Animate Dead", "Silvercoat Lion");
+
+        castSpell(1, PhaseStep.BEGIN_COMBAT, playerA, "Flicker of Fate", "Animate Dead");
+        setChoice(playerA, "Walking Corpse");     // card to attach reentering aura to
+        setChoice(playerA, "When {this} enters"); // resolve enters trigger last
+
+        setStopAt(1, PhaseStep.END_TURN);
+        execute();
+
+        assertPermanentCount(playerA, "Animate Dead", 1);
+        assertPermanentCount(playerA, "Walking Corpse", 1);
+        assertPermanentCount(playerA, "Silvercoat Lion", 0);
+        assertGraveyardCount(playerA, "Silvercoat Lion", 1);
+        assertGraveyardCount(playerA, "Walking Corpse", 0);
+        assertGraveyardCount(playerA, "Flicker of Fate", 1);
+    }
 }