Anti-Venom, Horrifying Healer + Agatha's Soul Cauldron + Winding Constrictor + Deathbringer Thoctar

Anti-Venom, Horrifying Healer

Agatha's Soul Cauldron

Winding Constrictor

Deathbringer Thoctar

How it works

1. Activate Anti-Venom using Deathbringer Thoctar's ability by removing a +1/+1 counter from it, targeting itself and putting two +1/+1 counters on it due to its replacement effect and Winding Constrictor.
2. Activate Anti-Venom using Deathbringer Thoctar's ability by removing a +1/+1 counter from it, dealing 1 damage to any target.
3. Repeat.

This clever loop turns damage prevention into an engine for infinite carnage by leveraging Agatha's Soul Cauldron to share activated abilities. By exiling Deathbringer Thoctar into the Cauldron, its deadly skills are granted to any creature bearing a +1/+1 counter—in this case, Anti-Venom, Horrifying Healer, who naturally accumulates those counters whenever damage to it is prevented. To supercharge the process, Winding Constrictor ensures that every time Anti-Venom prevents damage and tries to grow, it receives an extra +1/+1 counter, turning a self-inflicted 1-damage ping into a net gain of counters that fuels infinite activations.