Luminous Broodmoth + Pitiless Plunderer + Cult Conscript + Phantom Train

Luminous Broodmoth

Pitiless Plunderer

Cult Conscript

Phantom Train

How it works

1. Activate Phantom Train by sacrificing Cult Conscript.
2. When Cult Conscript dies, Luminous Broodmoth and Pitiless Plunderer trigger.
3. Resolve the Luminous Broodmoth trigger, returning Cult Conscript from your graveyard to the battlefield with a flying counter on it.
4. Resolve the Pitiless Plunderer trigger, creating a Treasure token.
5. Activate Phantom Train by sacrificing Cult Conscript.
6. When Cult Conscript dies, Pitiless Plunderer triggers, creating a Treasure token.
7. Resolve the Phantom Train abilities from steps 1 and 5
8. Activate the Treasures by tapping and sacrificing them, adding 1.
9. Activate Cult Conscript by paying 1, returning it from your graveyard to the battlefield.
10. Repeat.