This clever loop relies on a closed-circuit synergy where every piece continuously feeds the next to generate boundless resources. It all begins when you trigger Heliod, Sun-Crowned, using its passive lifegain trigger to drop a +1/+1 counter onto Scurry Oak. That influx of counters awakens Scurry Oak's own triggered ability, spawning a fresh 1/1 Squirrel token. As that token enters the battlefield, Lifecreed Duo notices the new arrival and promptly hands you a point of life. Because you just gained life, Heliod, Sun-Crowned triggers all over again, restarting the entire chain for an endless storm of tokens, counters, and life.