Zulaport Cutthroat + Reassembling Skeleton + Carnival of Souls + Phyrexian Altar

Zulaport Cutthroat

Reassembling Skeleton

Carnival of Souls

Phyrexian Altar

How it works

1. Activate Phyrexian Altar by sacrificing Reassembling Skeleton, adding one mana of any color.
2. Zulaport Cutthroat triggers, causing each opponent to lose 1 life and you to gain 1 life.
3. Activate Reassembling Skeleton by paying 1, returning it from your graveyard to the battlefield tapped.
4. Reassembling Skeleton enters the battlefield, triggering Carnival of Souls, causing you to lose 1 life and add to your mana pool.
5. Repeat.

This elegant loop turns the tireless persistence of Reassembling Skeleton into a devastating drain engine. By leveraging Phyrexian Altar to sacrifice the Skeleton—which simultaneously fuels your mana needs and triggers Zulaport Cutthroat to steadily bleed out your opponents—you establish a reliable recycling loop. The presence of Carnival of Souls cleverly offsets the mana cost by providing a black mana every time the Skeleton returns, keeping the cycle going until your foes are completely drained of life.