From 4cfad0a001ecc7bff661c968a31b3e992e17c0f2 Mon Sep 17 00:00:00 2001
From: Hans Mackowiak <hanmac@gmx.de>
Date: Mon, 6 Jun 2022 21:00:48 +0200
Subject: [PATCH] GameAction: 400.7a to keep Keyword from static ability

---
 .../src/main/java/forge/game/GameAction.java  | 32 +++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/forge-game/src/main/java/forge/game/GameAction.java b/forge-game/src/main/java/forge/game/GameAction.java
index dfda9c27aa6..011c5a2a597 100644
--- a/forge-game/src/main/java/forge/game/GameAction.java
+++ b/forge-game/src/main/java/forge/game/GameAction.java
@@ -37,6 +37,7 @@ import com.google.common.collect.Maps;
 import com.google.common.collect.Multimap;
 import com.google.common.collect.Multimaps;
 import com.google.common.collect.Sets;
+import com.google.common.collect.Table;
 
 import forge.GameCommand;
 import forge.StaticData;
@@ -66,6 +67,7 @@ import forge.game.event.GameEventGameStarted;
 import forge.game.event.GameEventScry;
 import forge.game.keyword.Keyword;
 import forge.game.keyword.KeywordInterface;
+import forge.game.keyword.KeywordsChange;
 import forge.game.mulligan.MulliganService;
 import forge.game.player.GameLossReason;
 import forge.game.player.Player;
@@ -489,6 +491,36 @@ public class GameAction {
             if (!zoneTo.is(ZoneType.Exile) && !zoneTo.is(ZoneType.Stack)) {
                 c.cleanupExiledWith();
             }
+
+            // 400.7a Effects from static abilities that give a permanent spell on the stack an ability
+            // that allows it to be cast for an alternative cost continue to apply to the permanent that spell becomes.
+            if (zoneFrom.is(ZoneType.Stack) && toBattlefield) {
+                List<KeywordInterface> newKw = Lists.newArrayList();
+                for (Table.Cell<Long, Long, KeywordsChange> cell : c.getChangedCardKeywords().cellSet()) {
+                    // comes from a static ability
+                    if (cell.getColumnKey() == 0) {
+                        continue;
+                    }
+                    for (KeywordInterface ki : cell.getValue().getKeywords()) {
+                        boolean keepKeyword = false;
+                        for (SpellAbility sa : ki.getAbilities()) {
+                            if (!sa.isSpell()) {
+                                continue;
+                            }
+                            if (sa.getAlternativeCost() != null) {
+                                keepKeyword = true;
+                                break;
+                            }
+                        }
+                        if (keepKeyword) {
+                            newKw.add(ki);
+                        }
+                    }
+                }
+                if (!newKw.isEmpty()) {
+                    copied.addChangedCardKeywordsInternal(newKw, null, false, copied.getTimestamp(), 0, true);
+                }
+            }
         }
 
         // if an adventureCard is put from Stack somewhere else, need to reset to Original State