Sek'Kuar, Deathkeeper + Cult Conscript + Yahenni, Undying Partisan + Pitiless Plunderer

Sek'Kuar, Deathkeeper

Cult Conscript

Yahenni, Undying Partisan

Pitiless Plunderer

How it works

1. Activate Yahenni by sacrificing Cult Conscript.
2. When Cult Conscript dies, Pitiless Plunderer and Sek'Kuar 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 Cult Conscript by paying 1, returning it from your graveyard to the battlefield.
9. Repeat.