Infinite creature ETBInfinite lifegain triggersInfinite lifegainInfinite creature tokensInfinite +1/+1 counters on a creature
How it works
Gain life.
Sunbond triggers, putting a +1/+1 counter on Scurry Oak.
Scurry Oak triggers, creating a creature token.
When the creature token enters the battlefield, Case of the Uneaten Feast triggers, causing you to gain 1 life.
Repeat from step 2.
This loop transforms a single instance of life gain into a self-sustaining engine of exponential growth. When you gain life, Sunbond leverages that event to pump up Scurry Oak with a +1/+1 counter, which in turn triggers Scurry Oak's ability to manufacture a 1/1 green Squirrel creature token. That new token's arrival on the battlefield immediately trips Case of the Uneaten Feast, giving you the 1 life you need to restart the entire sequence.