From 37f958b160b59aa9e99e52c2ea72ce736e53d0f6 Mon Sep 17 00:00:00 2001
From: Grath <1895280+Grath@users.noreply.github.com>
Date: Thu, 26 Jan 2023 11:17:52 -0500
Subject: [PATCH] Fix Silent Arbiter's blocking conditions to allow one block
 per player. (#9906)

As reported in #9905 per rule 802.4b, if you somehow have multiple creatures attacking (such as with Myriad in a multiplayer game) each player is allowed to make one block while Silent Arbiter is in play.
---
 Mage.Sets/src/mage/cards/s/SilentArbiter.java | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/Mage.Sets/src/mage/cards/s/SilentArbiter.java b/Mage.Sets/src/mage/cards/s/SilentArbiter.java
index 65c9b1d6c97..8cf0557191b 100644
--- a/Mage.Sets/src/mage/cards/s/SilentArbiter.java
+++ b/Mage.Sets/src/mage/cards/s/SilentArbiter.java
@@ -92,7 +92,16 @@ class SilentArbiterBlockRestrictionEffect extends RestrictionEffect {
     }
 
     @Override
-    public boolean canBlock(Permanent attacker, Permanent blocker, Ability source, Game game, boolean canUseChooseDialogs) {
-        return game.getCombat().getBlockers().isEmpty();
+    public boolean canBlock(Permanent attacker, Permanent newBlocker, Ability source, Game game, boolean canUseChooseDialogs) {
+        if (attacker == null) {
+            return true;
+        }
+        for (UUID creatureId : game.getCombat().getBlockers()) {
+            Permanent existingBlocker = game.getPermanent(creatureId);
+            if (game.getPlayer(existingBlocker.getControllerId()).hasOpponent(attacker.getControllerId(), game) && existingBlocker.isControlledBy(newBlocker.getControllerId())) {
+                return false;
+            }
+        }
+        return true;
     }
 }
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