Reassembling Skeleton + Yahenni, Undying Partisan + Pitiless Plunderer + Fumulus, the Infestation

Reassembling Skeleton

Yahenni, Undying Partisan

Pitiless Plunderer

Fumulus, the Infestation

How it works

1. Activate Yahenni by sacrificing Reassembling Skeleton.
2. When Reassembling Skeleton dies, Pitiless Plunderer and Fumulus trigger, creating a creature token and a Treasure token.
3. Resolve the Yahenni ability.
4. Activate Yahenni by sacrificing the creature token.
5. When the creature token dies, Pitiless Plunderer triggers, creating a Treasure token.
6. Resolve the Yahenni ability.
7. Activate the Treasures by tapping and sacrificing them, adding 1.
8. Activate Reassembling Skeleton by paying 1, returning it from your graveyard to the battlefield.
9. Repeat.