Derevi, Empyrial Tactician [Commander 2013] Abnormal during your opponent's End Phase:

during your opponent's End Phase: You must banish 5 cards from your GY face-down (this is not optional)

When this face-up card leaves the field: You can Special Summon 1 "Yubel - The Ultimate Nightmare" from your hand

Set: EX: Deoxys Type: Water Rarity: Rare Retreat cost: 0

and you proceed to damage calculation

Special Summon 1 FIRE Warrior monster from your hand or Deck

Derevi, Empyrial Tactician [Commander 2013] Abnormal during your opponent's End Phase:Set: Commander 2013 Type: Legendary Creature Bird Wizard Rarity: Mythic Cost: {G}{W}{U} Flying Whenever Derevi, Empyrial Tactician enters the battlefield or a creature you control deals combat damage to a player, you may tap or untap target permanent. {1}{G}{W}{U}: Put Derevi onto the battlefield from the command zone.