Scurry Oak + Coat of Arms

Prerequisites

You have a way to put a +1/+1 counter on Scurry Oak. The number of Squirrels on the battlefield is greater than Scurry Oak's power.

Steps

1. Put a +1/+1 counter on Scurry Oak.
2. Scurry Oak triggers, creating a 1/1 Squirrel creature token that gets +1/+1 for each other Squirrel on the battlefield.
3. The Squirrel enters the battlefield, triggering Scurry Oak's evolve ability, putting a +1/+1 counter on Scurry Oak.
4. Repeat from step 2.