Derevi, Empyrial Tactician [Commander 2013] Guildpact You may put a green

You may put a green permanent card with mana value X or less from among them onto the battlefield

Put that card in your hand and exile all other cards revealed this way

Set: Dragons of Tarkir Type: Legendary Planeswalker — Sarkhan Rarity: Mythic Cost: {2}{G}{U}{R} +1: Draw a card

You lose life equal to its mana value

It's a matter of strength

Derevi, Empyrial Tactician [Commander 2013] Guildpact You may put a greenSet: 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.