Ultros, Obnoxious Octopus + Agatha's Soul Cauldron + Crystalline Crawler + Wurmcalling

Ultros, Obnoxious Octopus

Agatha's Soul Cauldron

Crystalline Crawler

Wurmcalling

How it works

1. Cast Wurmcalling with buyback by paying 6.
2. Ultros's first and second abilities trigger, tapping a creature an opponent controls and putting a stun counter on it, and then putting eight +1/+1 counters on Ultros.
3. Resolve Wurmcalling, creating a 4/4 Wurm creature token and returning Wurmcalling to your hand.
4. Activate Ultros using Crystalline Crawler's first ability eight times by removing eight +1/+1 counter from it, adding 6.
5. Repeat.