Anti-Venom, Horrifying Healer + Agatha's Soul Cauldron + Gratuitous Violence + Deathbringer Thoctar

Anti-Venom, Horrifying Healer

Agatha's Soul Cauldron

Gratuitous Violence

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 Gratuitous Violence.
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 loop turns Agatha's Soul Cauldron into a masterclass of borrowed abilities by having it exile Deathbringer Thoctar, granting its lethal activated ability to any creature you control that holds a +1/+1 counter. When you use that ability to deal 1 damage to Anti-Venom, Horrifying Healer, its damage prevention replacement effect turns that self-inflicted blow into a fresh crop of counters. Amplified by Gratuitous Violence doubling the prevented damage event—or rather, the mechanics that allow the loop to scale—you continuously strip and replace counters to fuel an endless chain of damage.