Evolution Witness, Builder's Talent, and Dark Sphere

Prerequisites

• Evolution Witness on the battlefield
• Builder's Talent on the battlefield
• Dark Sphere in hand

Steps

1. Cast Dark Sphere by paying its mana cost
2. When Dark Sphere enters, Builder's Talent's second ability triggers
3. Holding priority, activate Dark Sphere by tapping and sacrificing it
4. Resolve the Builder's Talent trigger, putting a +1/+1 counter on Evolution Witness
5. Evolution Witness triggers, returning Dark Sphere from your graveyard to your hand
6. Repeat

Results

• Infinite +1/+1 counters on a creature
• Infinite storm count