Death Dealer

Nullify (this permanent is immune to all spells and enchantments with the same color as this card)
When Death Dealer enters the battlefield, all players must sacrifice 1 of their creatures. Then pick 1 target player, that player must sacrifice all green and white mana in their mana pool. When Death Dealer leaves play, all graveyards besides yours are exiled. Shuffle your graveyard into your deck and exile Death Dealer.