Agatha's Soul Cauldron + Ashnod's Altar + Chaos Spewer + Reaping Willow

Mana needed: {2}

RWB identity

Commander legal

The 4 combo pieces

How to execute it

  1. Activate Reaping Willow by paying {2} due to Agatha's Soul Cauldron and removing two counters from it, returning Chaos Spewer from your graveyard to the battlefield.
  2. When Chaos Spewer enters, it triggers. Choose not to pay and put two -1/-1 counters on Reaping Willow.
  3. Activate Ashnod's Altar by sacrificing Chaos Spewer, adding {C}{C}.
  4. Repeat.

What the combo produces