Elf King

Industructable
When King enters the battlefield both players exile half their nonland permanents they control, (rounded down) and discard half card in their hand, (rounded down). Once per game pay 5 health to summon a elf creature from your hand or library without paying any cost. This card gains +1/+1 for each creature card in your graveyard. If elf King is destroyed exile 5 elf creatures from your graveyard and pay 5 health. If you do, return elf King to the battlefield tapped.