Fix Skyfire Phoenix's triggered ability.

Mage.Sets/src/mage/cards/s/SkyfirePhoenix.java

@@ -64,7 +64,7 @@ class SkyfirePhoenixTriggeredAbility extends SpellCastControllerTriggeredAbility
     public boolean checkTrigger(GameEvent event, Game game) {
         return super.checkTrigger(event, game) && game.getCommandersIds(
                 game.getPlayer(getControllerId()), CommanderCardType.COMMANDER_OR_OATHBREAKER
-        ).contains(event.getTargetId());
+        ).contains(event.getSourceId());
     }
 
     @Override

Mage.Tests/CommanderDuel_Partners.dck

@@ -0,0 +1,71 @@
+NAME:Partner Commanders
+1 [THS:58] Ordeal of Thassa
+1 [5ED:388] Mana Vault
+1 [THS:14] Gift of Immortality
+1 [PC2:12] Spirit Mantle
+1 [M13:36] Sublime Archangel
+1 [M13:206] Gilded Lotus
+1 [M11:5] Armored Ascension
+1 [ALA:27] Sigiled Paladin
+1 [ALA:26] Sighted-Caste Sorcerer
+1 [CON:2] Asha's Favor
+1 [M14:210] Fireshrieker
+1 [GTC:17] Holy Mantle
+1 [CHK:65] Hinder
+1 [DGM:96] Render Silent
+1 [M13:74] Tricks of the Trade
+1 [ISD:229] Mask of Avacyn
+1 [GPT:28] Infiltrator's Magemark
+14 [THS:234] Island
+1 [CMD:261] Sol Ring
+1 [THS:25] Ordeal of Heliod
+1 [5DN:131] Helm of Kaldra
+1 [M12:24] Lifelink
+1 [AVR:50] Elgaud Shieldmate
+19 [THS:230] Plains
+1 [M14:23] Indestructibility
+1 [M14:5] Archangel of Thune
+1 [CMD:265] Azorius Chancery
+1 [ARB:3] Ethercaste Knight
+1 [ARB:1] Ardent Plea
+1 [M13:18] Guardians of Akrasa
+1 [CMD:40] Brainstorm
+1 [UDS:139] Thran Dynamo
+1 [M12:219] Swiftfoot Boots
+1 [THS:39] Aqueous Form
+1 [M13:6] Aven Squire
+1 [MMA:25] Path to Exile
+1 [M13:4] Angelic Benediction
+1 [CMD:253] Lightning Greaves
+1 [SHM:150] Steel of the Godhead
+1 [M13:225] Glacial Fortress
+1 [10E:40] Serra's Embrace
+1 [JUD:31] Unquestioned Authority
+1 [M13:221] Cathedral of War
+1 [RTR:9] Ethereal Armor
+1 [DDL:27] Battle Mastery
+1 [DDL:24] Bonds of Faith
+1 [ISD:53] Dissipate
+1 [DKA:148] Executioner's Hood
+1 [DIS:159] Azorius Signet
+1 [GTC:37] Hands of Binding
+1 [PC2:112] Quietus Spike
+1 [MRD:144] Banshee's Blade
+1 [AVR:36] Silverblade Paladin
+1 [PC2:115] Whispersilk Cloak
+1 [M12:73] Ponder
+1 [M13:29] Rhox Faithmender
+1 [ALA:1] Akrasan Squire
+1 [M13:213] Ring of Thune
+1 [UDS:46] Sigil of Sleep
+1 [M13:211] Ring of Evos Isle
+1 [RTR:241] Hallowed Fountain
+1 [7ED:67] Counterspell
+1 [ISD:49] Curiosity
+1 [SOM:229] Seachrome Coast
+1 [PC2:10] Mammoth Umbra
+1 [MBS:104] Darksteel Plate
+1 [M13:21] Knight of Glory
+1 [M13:22] Oblivion Ring
+SB: 1 [C16:33] Ishai, Ojutai Dragonspeaker
+SB: 1 [C16:46] Thrasios, Triton Hero

Mage.Tests/src/test/java/org/mage/test/commander/duel/TestPartnerCommanders.java

@@ -0,0 +1,32 @@
+package org.mage.test.commander.duel;
+
+import mage.constants.PhaseStep;
+import mage.constants.Zone;
+import mage.game.Game;
+import mage.game.GameException;
+import org.junit.Test;
+import org.mage.test.serverside.base.CardTestCommanderDuelBase;
+
+import java.io.FileNotFoundException;
+
+public class TestPartnerCommanders extends CardTestCommanderDuelBase {
+
+
+    @Override
+    protected Game createNewGameAndPlayers() throws GameException, FileNotFoundException {
+        setDecknamePlayerA("CommanderDuel_Partners.dck"); // Commander = Ishai, Ojutai Dragonspeaker and Thrasios, Triton Hero
+        return super.createNewGameAndPlayers();
+    }
+
+    @Test
+    public void testSkyfirePhoenix() {
+        addCard(Zone.GRAVEYARD, playerA, "Skyfire Phoenix");
+        addCard(Zone.BATTLEFIELD, playerA, "Tropical Island", 4);
+        castSpell(1, PhaseStep.PRECOMBAT_MAIN, playerA, "Thrasios, Triton Hero");
+        setStopAt(1, PhaseStep.END_TURN);
+        execute();
+
+        assertPermanentCount(playerA, "Thrasios, Triton Hero", 1);
+        assertPermanentCount(playerA, "Skyfire Phoenix", 1);
+    }
+}