Anti-Venom, Horrifying Healer + Agatha's Soul Cauldron + Deathbringer Thoctar + Innkeeper's Talent

Anti-Venom, Horrifying Healer

Agatha's Soul Cauldron

Deathbringer Thoctar

Innkeeper's Talent

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 Innkeeper's Talent.
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 starts by using Agatha's Soul Cauldron to exile Deathbringer Thoctar, granting its activated ability to any creature you control that holds a +1/+1 counter. Anti-Venom, Horrifying Healer happily steps into this role, especially because Innkeeper's Talent ensures that whenever damage would be dealt to Anti-Venom, its prevention effect instead stacks double the amount of +1/+1 counters onto it. By repeatedly activating the borrowed ability to ping Anti-Venom for 1 damage, you trigger its damage-prevention growth into an engine that generates infinite +1/+1 counters and infinite damage.