Valentin, Dean of the Vein // Lisette, Dean of the Root, Spike Feeder, and Cryptic Trilobite

Prerequisites

• Valentin, Dean of the Vein // Lisette, Dean of the Root on the battlefield
• Spike Feeder on the battlefield
• Cryptic Trilobite on the battlefield
• Dean of the Root
• Spike Feeder and Cryptic Trilobite have at least two +1/+1 counters

Steps

1. Activate Cryptic Trilobite's first ability by removing a +1/+1 counter from it, adding that can only be spent to activate abilities
2. Activate Spike Feeder's second ability by removing a +1/+1 counter from it, causing you to gain two life
3. Lisette triggers, causing you to pay to put a +1/+1 counter on each creature you control
4. Repeat

Results

• Infinite +1/+1 counters on all creatures you control except Spike Feeder
• Infinite colorless mana that can only be spent to activate abilities
• Infinite lifegain
• Infinite lifegain triggers