Derevi, Empyrial Tactician [Commander 2013] SPWA-EN016 if this card battles an

if this card battles an opponent's monster while this card has a "Utopia" Xyz Monster as Xyz Material: You can detach 2 Xyz Materials from this card

among any of the creatures it's being blocked by or is blocking

discard an Energy card attached to the Defending Pokemon

Discard all Energy cards attached to Pikachu in order to use this attack

Set: Diamond and Pearl Promos Type: Fighting Rarity: Holo Rare Retreat cost: 2 [1P] Poison Revenge (20+)

Derevi, Empyrial Tactician [Commander 2013] SPWA-EN016 if this card battles anSet: 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.