Agatha's Soul Cauldron, Blech, Loafing Pest, and Deathbringer Thoctar

Prerequisites

• Agatha's Soul Cauldron on the battlefield
• Blech, Loafing Pest on the battlefield
• Deathbringer Thoctar in exile

Steps

1. Activate Blech by using Deathbringer Thoctar's ability by removing a +1/+1 counter from it, dealing 1 damage to any target and causing you to gain 1 life due to its lifelink
2. Blech triggers, putting a +1/+1 counter on it
3. Repeat

Results

• Infinite +1/+1 counters on certain creatures
• Infinite damage
• Infinite lifegain
• Infinite lifegain triggers