Ashnod's Altar + Sporoloth Ancient + Tainted Observer + Tekuthal, Inquiry Dominus

GU identity

Commander legal

The 4 combo pieces

What must be in place

You control a creature with at least three spore counters on it.

How to execute it

  1. Activate a creature you control by removing two spore counters from it, creating a 1/1 Saproling creature token.
  2. The Saproling enters the battlefield, triggering Tainted Observer.
  3. Holding priority, activate Ashnod's Altar by sacrificing the Saproling, adding {C}{C}.
  4. Resolve the Tainted Observer trigger, causing you to pay {2} to put two spore counters on any creature you control.
  5. Repeat.

What the combo produces