Evolution Witness, Builder's Talent, and Lotus Petal

Prerequisites

• Evolution Witness on the battlefield
• Builder's Talent on the battlefield
• Lotus Petal in hand

Steps

1. Cast Lotus Petal by paying its mana cost
2. When Lotus Petal enters, Builder's Talent's second ability triggers
3. Holding priority, activate Lotus Petal 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 Lotus Petal from your graveyard to your hand
6. Repeat

Results

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