Chalk Outline, Golbez, Crystal Collector, Cloakwood Swarmkeeper, and Moss-Pit Skeleton

Prerequisites

• Chalk Outline on the battlefield
• Golbez, Crystal Collector on the battlefield
• Cloakwood Swarmkeeper on the battlefield
• Moss-Pit Skeleton in the graveyard

Steps

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, Golbez and Cloakwood Swarmkeeper trigger
5. Resolve the Golbez 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

Results

• Infinite ETB
• Infinite creature tokens
• Infinite Clue tokens
• Infinite +1/+1 counters on a creature