Szarel, Genesis Shepherd + Evolution Witness + Dark Sphere

Szarel, Genesis Shepherd

Evolution Witness

Dark Sphere

How it works

1. Activate Dark Sphere by tapping and sacrificing it.
2. Szarel triggers, putting a number of +1/+1 counters equal to its power on Evolution Witness.
3. Evolution Witness triggers, returning Dark Sphere from your graveyard to your hand.
4. Resolve the Dark Sphere ability.
5. Cast Dark Sphere by paying 0.
6. Repeat.