Activate Phyrexian Altar by sacrificing Biblioplex Tomekeeper, adding .
Kheru Bloodsucker triggers, causing each opponent to lose 2 life and you to gain 2 life.
Cast the copy of Reanimate from exile by paying , returning Biblioplex Tomekeeper from your graveyard to the battlefield and losing 4 life.
When Biblioplex Tomekeeper enters, it triggers, preparing Grave Researcher.
Repeat until each opponent with a lower life total than your own has lost the game.
This elegant loop hinges on Grave Researcher serving as your engine, generating a castable copy of Reanimate every upkeep once prepared, which we can then accelerate to instant-speed loops. By cycling Biblioplex Tomekeeper in and out of the graveyard, its entrance trigger continuously re-prepares Grave Researcher to keep the chain going. Phyrexian Altar provides the crucial mana source by turning your sacrificed creatures into the black mana needed to cast Reanimate over and over. Meanwhile, Kheru Bloodsucker watches the carnage, quietly draining your opponents out of the game each time a qualifying creature hits the graveyard.