Snarling Gorehound, Insidious Roots, Skeleton Crew, and Moss-Pit Skeleton

Prerequisites

• Snarling Gorehound on the battlefield
• Insidious Roots on the battlefield
• Skeleton Crew on the battlefield
• Moss-Pit Skeleton in the graveyard
• You have a way to put a +1/+1 counter on a creature you control

Steps

1. Put a +1/+1 counter on a creature you control
2. Moss-Pit Skeleton triggers, putting itself on top of your library
3. Skeleton Crew and Insidious Roots trigger
4. Resolve the Skeleton Crew trigger, creating a 2/2 Skeleton Pirate creature token
5. When the Skeleton Pirate enters the battlefield, Snarling Gorehound triggers, causing you to surveil 1, putting Moss-Pit Skeleton into your graveyard from the top of your library
6. Resolve the Insidious Roots trigger, creating a 0/1 Plant creature token, then putting a +1/+1 counter on each Plant you control
7. Moss-Pit Skeleton and Snarling Gorehound trigger
8. Resolve the Snarling Gorehound trigger, causing you to surveil 1
9. Resolve the Moss-Pit Skeleton trigger, putting it on top of your library
10. Repeat from step 3

Results

• Infinite +1/+1 counters on Plants you control
• Infinite creature tokens
• Infinite ETB
• Infinite surveil