The Pitiless Plunderer + Ashnod's Altar + Reassembling Skeleton loop produces Infinite colorless mana, Infinite death triggers, Infinite ETB, Infinite LTB on its own — it needs a separate finisher to actually win. Elenda, the Dusk Rose serves as a secondary payoff engine, creating a burst of tokens on death that Bastion of Remembrance or The Meathook Massacre converts into lethal drain.
Combo core: Reassembling Skeleton loops infinitely with Phyrexian Altar and Pawn of Ulamog—each death triggers Pawn to make a Spawn token, which taps for mana to recast Skeleton, and Teysa doubles the death trigger so you net mana and card advantage. Pitiless Plunderer + Ashnod's Altar + Reassembling Skeleton works identically, generating infinite colorless mana and infinite death triggers. The kill: Once you have infinite mana and death triggers, Exsanguinate drains the table for X life, or Toxic Deluge wipes the board at instant speed while you pay life to shrink creatures to lethal. Elenda payoff: Elenda, the Dusk Rose accumulates +1/+1 counters as creatures die, then creates a variable burst of Vampire tokens when she dies; Bastion of Remembrance or The Meathook Massacre converts each token entry into 1 damage per opponent, scaling to 80+ damage in a single turn. Tutors and setup: Demonic Tutor, Diabolic Intent, and Profane Tutor find missing combo pieces or payoffs on demand; Buried Alive and Entomb stock the graveyard with Reassembling Skeleton or Nether Traitor for fast reanimation. Protection layer: Drivnod, Carnage Dominus doubles death triggers like Teysa, unlocking the four-piece combo (Pitiless Plunderer + Reassembling Skeleton + Viscera Seer + Drivnod) and protecting your engine from single-piece removal. Malakir Rebirth and Kaya's Ghostform give creatures a second death trigger, turning a single sacrifice into two payoff events.