Moss-Pit Skeleton + Kheru Goldkeeper + Cloakwood Swarmkeeper + Rook Turret

Moss-Pit Skeleton

Kheru Goldkeeper

Cloakwood Swarmkeeper

Rook Turret

How it works

1. Put a +1/+1 counter on a creature you control.
2. Moss-Pit Skeleton triggers, putting it from your graveyard onto the top of your library.
3. Kheru Goldkeeper triggers, creating a Treasure token.
4. When the Treasure enters the battlefield, Rook Turret and Cloakwood Swarmkeeper trigger.
5. Resolve the Rook Turret trigger, drawing Moss-Pit Skeleton from your library, and then discarding it.
6. Resolve the Cloakwood Swarmkeeper trigger, putting a +1/+1 counter on it.
7. Repeat from step 2.

This clever engine transforms a simple +1/+1 counter into an endless cycle of graveyard recycling and artifact generation, anchored by Kheru Goldkeeper's ability to manufacture Treasure tokens whenever cards leave your graveyard. As that Treasure enters the battlefield, Rook Turret allows you to instantly draw and discard the Moss-Pit Skeleton that just returned to the top of your library, sending it straight back to the graveyard to trigger the loop anew. Meanwhile, Cloakwood Swarmkeeper happily grows larger with each iteration by watching your new tokens arrive, compounding the power of your board state while generating infinite colored mana and loot triggers.