Pestilence Demon, Archangel of Thune, and K'rrik, Son of Yawgmoth

Prerequisites

• Pestilence Demon on the battlefield
• Archangel of Thune on the battlefield
• K'rrik, Son of Yawgmoth on the battlefield
• You have a way to give Pestilence Demon lifelink
• Your life total is at least 3

Steps

1. Give Pestilence Demon lifelink by any method
2. Activate Pestilence Demon by paying 2 life, dealing 1 damage to each creature and each player and causing you to gain life equal to the amount of damage dealt this way
3. Archangel of Thune triggers, putting a +1/+1 counter on each creature you control
4. Repeat from step 2

Results

• Infinite +1/+1 counters
• Infinite damage
• Infinite lifegain
• Infinite lifegain triggers