Requires

Yawgmoth, Thran Physician must be in hand. Scurry Oak must be on the battlefield. Suture Priest must be on the battlefield. Mana needed:

Steps

1. Cast Yawgmoth by paying .
2. When Yawgmoth enters the battlefield, Suture Priest's first ability and Scurry Oak's evolve ability trigger.
3. Holding priority, activate Yawgmoth by paying 1 life and sacrificing a creature, putting a -1/-1 counter on Scurry Oak and causing you to draw a card.
4. Resolve the Suture Priest trigger, causing you to gain 1 life.
5. Resolve the Scurry Oak trigger, putting a +1/+1 counter on it, triggering Scurry Oak's second ability.
6. Holding priority, activate Yawgmoth by paying 1 life and sacrificing a creature, putting a -1/-1 counter on Scurry Oak and causing you to draw a card.
7. Resolve the Scurry Oak trigger, creating a 1/1 Squirrel creature token.
8. When the Squirrel enters the battlefield, Suture Priest's first ability and Scurry Oak's evolve ability trigger.
9. Repeat from step 3.

Results