Pitiless Plunderer + Reassembling Skeleton + Yahenni, Undying Partisan + Delney, Streetwise Lookout

Pitiless Plunderer

Reassembling Skeleton

Yahenni, Undying Partisan

Delney, Streetwise Lookout

How it works

1. Activate Yahenni by sacrificing Reassembling Skeleton.
2. When Reassembling Skeleton dies, Pitiless Plunderer triggers twice, creating two Treasure tokens.
3. Resolve the Yahenni ability.
4. Activate the Treasure tokens by tapping and sacrificing them, adding 1.
5. Activate Reassembling Skeleton by paying 1, returning it from your graveyard to the battlefield tapped.
6. Repeat.