Requires

Ayula, Queen Among Bears must be on the battlefield. Scurry Oak must be in hand. Xenograft must be on the battlefield. Xenograft on the battlefield with "Bear" chosen. Mana needed:

Steps

1. Cast Scurry Oak by paying .
2. When Scurry Oak enters the battlefield as a Bear due to Xenograft, Ayula triggers, putting two +1/+1 counters on Scurry Oak.
3. Scurry Oak triggers, creating a 1/1 Squirrel creature token.
4. When the Squirrel enters the battlefield as a Bear due to Xenograft, Ayula triggers, putting two +1/+1 counters on Scurry Oak.
5. Repeat from step 3.

Results