Cafoga, Plane Unraveler

Devoid (This card has no color.)
Annihilator 2 (Whenever this creature attacks, defending player sacrifices 2 permanents.)
Armageddon 2 (When this creature dies, target opponent sacrifices 2 permanents.)
{w}{u}{b}{r}{g}, {t}: Add {x} colorless mana, where X was how much was spent to cast Cafoga, Plane Unraveler.