From 0a1f2f6670ba6476ca94f677669f63d6acb4eafb Mon Sep 17 00:00:00 2001
From: Agetian <stavdev@mail.ru>
Date: Wed, 28 Nov 2018 15:31:16 +0300
Subject: [PATCH] - Improve AI for Brothers Yamazaki.

---
 .../java/forge/ai/ability/PermanentAi.java    | 19 +++++++++++++++++--
 .../res/cardsfolder/b/brothers_yamazaki.txt   |  2 ++
 2 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/forge-ai/src/main/java/forge/ai/ability/PermanentAi.java b/forge-ai/src/main/java/forge/ai/ability/PermanentAi.java
index d0579d313ad..e89c9e87d3e 100644
--- a/forge-ai/src/main/java/forge/ai/ability/PermanentAi.java
+++ b/forge-ai/src/main/java/forge/ai/ability/PermanentAi.java
@@ -61,8 +61,23 @@ public class PermanentAi extends SpellAbilityAi {
         if (card.getType().isLegendary()
                 && !game.getStaticEffects().getGlobalRuleChange(GlobalRuleChange.noLegendRule)) {
             if (ai.isCardInPlay(card.getName())) {
-                // AiPlayDecision.WouldDestroyLegend
-                return false;
+                if (!card.hasSVar("AILegendaryException")) {
+                    // AiPlayDecision.WouldDestroyLegend
+                    return false;
+                } else {
+                    String specialRule = card.getSVar("AILegendaryException");
+                    if ("TwoCopiesAllowed".equals(specialRule)) {
+                        // One extra copy allowed on the battlefield, e.g. Brothers Yamazaki
+                        if (CardLists.filter(ai.getCardsIn(ZoneType.Battlefield), CardPredicates.nameEquals(card.getName())).size() > 1) {
+                            return false;
+                        }
+                    } else if ("AlwaysAllowed".equals(specialRule)) {
+                        // Nothing to do here, check for Legendary is disabled
+                    } else {
+                        // Unknown hint, assume two copies not allowed
+                        return false;
+                    }
+                }
             }
         }
 
diff --git a/forge-gui/res/cardsfolder/b/brothers_yamazaki.txt b/forge-gui/res/cardsfolder/b/brothers_yamazaki.txt
index 36da0aff1c4..0204b134bf5 100644
--- a/forge-gui/res/cardsfolder/b/brothers_yamazaki.txt
+++ b/forge-gui/res/cardsfolder/b/brothers_yamazaki.txt
@@ -7,5 +7,7 @@ S:Mode$ Continuous | Affected$ Permanent.namedBrothers Yamazaki | CheckSVar$ X |
 SVar:X:Count$Valid Permanent.namedBrothers Yamazaki
 S:Mode$ Continuous | Affected$ Creature.Other+namedBrothers Yamazaki | AddPower$ 2 | AddToughness$ 2 | AddKeyword$ Haste | Description$ Each other creature named CARDNAME gets +2/+2 and has haste.
 DeckHints:Name$Brothers Yamazaki
+SVar:AILegendaryException:TwoCopiesAllowed
+SVar:PlayMain1:TRUE
 SVar:Picture:http://www.wizards.com/global/images/magic/general/brothers_yamazaki.jpg
 Oracle:Bushido 1 (Whenever this creature blocks or becomes blocked, it gets +1/+1 until end of turn.)\nIf there are exactly two permanents named Brothers Yamazaki on the battlefield, the "legend rule" doesn't apply to them.\nEach other creature named Brothers Yamazaki gets +2/+2 and has haste.