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

The Wise Mothman

Moss-Pit Skeleton

Altar of Dementia

Scurry Oak

How it works

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

This clever loop turns the self-sustaining synergy of Scurry Oak and The Wise Mothman into an engine for infinite sacrifice. Whenever a +1/+1 counter lands on Scurry Oak, its ability creates a Squirrel token, while concurrently triggering Moss-Pit Skeleton to return from your graveyard to the top of your library. Sacrificing that freshly made Squirrel to Altar of Dementia mills the Moss-Pit Skeleton right back into the graveyard, which in turn causes The Wise Mothman to place a fresh +1/+1 counter back onto Scurry Oak to restart the entire sequence.