Sunbond + Scurry Oak + Auriok Champion

Sunbond

Scurry Oak

Auriok Champion

How it works

1. Gain life.
2. Sunbond triggers, putting a +1/+1 counter on Scurry Oak.
3. Scurry Oak triggers, creating a creature token.
4. When the creature token enters the battlefield, Auriok Champion triggers, causing you to gain 1 life.
5. Repeat from step 2.

This delightful loop turns a single burst of life into an exponentially growing army, starting when Sunbond converts your lifegain into a torrent of +1/+1 counters on Scurry Oak. Each time those counters land, Scurry Oak's triggered ability rewards you with a fresh 1/1 Squirrel token. As that token enters the battlefield, Auriok Champion welcomes it with a helpful dose of life, which in turn restarts Sunbond to keep the entire engine spinning.