Ulasht, the Hate Seed, Slimefoot, the Stowaway, Valentin, Dean of the Vein // Lisette, Dean of the Root, and Ashnod's Altar

Prerequisites

• Ulasht, the Hate Seed on the battlefield
• Slimefoot, the Stowaway on the battlefield
• Valentin, Dean of the Vein // Lisette, Dean of the Root on the battlefield
• Ashnod's Altar on the battlefield
• Dean of the Root
• Ulasht has at least two +1/+1 counters on it
• available

Steps

1. Activate Ulasht by paying and removing a +1/+1 counter from it, creating a 1/1 Saproling creature token
2. Activate Ashnod's Altar by sacrificing the Saproling, adding
3. The Saproling dies, triggering Slimefoot, dealing 1 damage to each opponent and causing you to gain 1 life
4. Lisette triggers, causing you to pay to put a +1/+1 counter on each creature you control
5. Repeat

Results

• Infinite +1/+1 counters on all creatures you control except Ulasht
• Infinite damage
• Infinite death triggers
• Infinite ETB
• Infinite lifegain
• Infinite lifegain triggers
• Infinite LTB
• Infinite sacrifice triggers