Gäjeel, Master of the Void

When Gajeel master of the void enters the battlefield remove all voidwalkers from the game
Flying, Energize 7, First Strike, Annihilator 3
{e}{e}{2}{w/b}{t}, return target creature from exile to your hand
Gajeel cannot be the target of any spells, can't be enchanted, and cant equip artifacts.
When Gajeel, master of the void enters the graveyard from the battle field, place him back of the battlefield and transform him and return all voidwalkers to their owners hand