The Wise Mothman, Moss-Pit Skeleton, Altar of Dementia, and Scurry Oak

Prerequisites

• The Wise Mothman on the battlefield
• Moss-Pit Skeleton in the graveyard
• Altar of Dementia on the battlefield
• Scurry Oak on the battlefield

Steps

1. Put a +1/+1 counter on Scurry Oak, Scurry Oak's second ability and Moss-Pit Skeleton trigger
2. Resolve the Scurry Oak trigger, creating a 1/1 Squirrel creature token
3. Resolve the Moss-Pit Skeleton trigger, putting it from your graveyard on top of your library
4. Activate Altar of Dementia by sacrificing the Squirrel token, causing you to mill Moss-Pit Skeleton from the top of your library
5. The Wise Mothman's second ability triggers, putting a +1/+1 counter on Scurry Oak
6. Repeat from step 2

Results

• Infinite +1/+1 counters on Scurry Oak
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers