Evolution Witness, Agonasaur Rex, Kheru Goldkeeper, Doubling Season, and Exalted Sunborn

Prerequisites

• Evolution Witness on the battlefield
• Agonasaur Rex in hand
• Kheru Goldkeeper on the battlefield
• Doubling Season on the battlefield
• Exalted Sunborn on the battlefield
• available

Steps

1. Activate Agonasaur Rex's cycling ability by paying and discarding it
2. Agonasaur Rex triggers, putting two +1/+1 counters on Evolution Witness
3. Evolution Witness triggers, returning Agonasaur Rex from your graveyard to your hand
4. Kheru Goldkeeper triggers, creating four Treasure tokens
5. Resolve the Agonasaur Rex ability from step 1, causing you to draw a card
6. Activate three Treasures by tapping and sacrificing them, adding
7. Repeat

Results

• Infinite card draw
• Infinite draw triggers
• Infinite self-discard triggers
• Near-infinite +1/+1 counters on a creature
• Near-infinite Treasure tokens
• Near-infinite colored mana