This clever loop turns a single instance of life gain into an escalating chain of growth and token generation. The engine is anchored by Archangel of Thune, whose static lifelink and triggered ability mean that any influx of life immediately pumps every creature you control. When those +1/+1 counters land on Scurry Oak, its triggered ability responds by spawning a 1/1 green Squirrel token. That fresh body entering the battlefield then trips Hinterland Sanctifier, which feeds right back into Archangel of Thune by granting you another life—and seamlessly restarting the entire cycle.