Chalk Outline + Sarinth Steelseeker + Cloakwood Swarmkeeper + Moss-Pit Skeleton

Chalk Outline

Sarinth Steelseeker

Cloakwood Swarmkeeper

Moss-Pit Skeleton

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. Chalk Outline triggers, creating a 2/2 Detective creature token and a Clue token.
4. When the Clue enters the battlefield, Sarinth Steelseeker and Cloakwood Swarmkeeper trigger.
5. Resolve the Sarinth Steelseeker trigger, putting Moss-Pit Skeleton from the top of your library into your graveyard.
6. Resolve the Cloakwood Swarmkeeper trigger, putting a +1/+1 counter on it.
7. Repeat from step 2.

This charming loop relies on a clever bridge between your graveyard and library, kicked off the moment you place a +1/+1 counter on a creature you control to summon Moss-Pit Skeleton back to the top of your deck. That movement causes Chalk Outline to trigger, flooding the board with a Detective token and a Clue token every single time a creature leaves your graveyard. As the Clue enters, Sarinth Steelseeker catches it to effortlessly mill the Moss-Pit Skeleton right back into your graveyard, while Cloakwood Swarmkeeper happily grows with a +1/+1 counter from the token's arrival. Because that new counter immediately re-triggers the Skeleton, the engine feeds endlessly into an infinite cascade of creature tokens, artifact tokens, and steady growth.