MTG >Combos >Phyrexian Altar +Exhume +Dark Ritual +Kairi, the Swirling Sky +

Sacrifice Kairi to add a black mana With Kairi's ability on the stack, cast Dark Ritual With Kairi's trigger, mill six cards and return Dark Ritual and Exhume from your graveyard to your hand Cast Exhume to return Kairi to the battlefield Repeat the process.