Anti-Venom, Horrifying Healer + Agatha's Soul Cauldron + Triskelion + Taii Wakeen, Perfect Shot

Anti-Venom, Horrifying Healer

Agatha's Soul Cauldron

Triskelion

Taii Wakeen, Perfect Shot

How it works

1. Activate Taii Wakeen by paying 1 and tapping it, increasing the amount of damage sources you control deal this turn by one.
2. Activate Anti-Venom using Triskelion'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 Taii Wakeen.
3. Activate Anti-Venom using Triskelion's ability by removing a +1/+1 counter from it, dealing 1 damage to any target.
4. Repeat from step 2.

This loop transforms Anti-Venom into a lethal engine by feeding it the activated abilities of Triskelion exiled beneath Agatha's Soul Cauldron. Thanks to the color-fixing and ability-granting mana provided by Agatha's Soul Cauldron, Anti-Venom gains Triskelion's counter-removal and damage-dealing ability while retaining its own damage-prevention replacement effect. When Anti-Venom targets itself with this damage, its replacement effect turns that prevented damage into +1/+1 counters, a process further amplified by Taii Wakeen, Perfect Shot to easily generate a net surplus of counters and achieve infinite damage.