Scurry Oak + Sadistic Glee + Umbral Collar Zealot

Scurry Oak

Sadistic Glee

Umbral Collar Zealot

How it works

1. Activate Umbral Collar Zealot by sacrificing any other creature.
2. When the creature dies, Sadisitc Glee triggers, putting a +1/+1 counter on Scurry Oak.
3. Scurry Oak triggers, creating a 1/1 Squirrel creature token.
4. Resolve the Umbral Collar Zealot ability, putting a +1/+1 counter on it.
5. Repeat.

This clever loop spins into infinity by feeding on itself using Scurry Oak as both the engine and the payoff. Whenever Umbral Collar Zealot sacrifices a creature to fuel its ability, the resulting death triggers Sadistic Glee to pump a +1/+1 counter onto Scurry Oak. That counter influx causes Scurry Oak to churn out a fresh 1/1 green Squirrel creature token, which immediately stands ready to be sacrificed to the Zealot all over again.