Ashnod's Altar + Doubling Season + Sporoloth Ancient + Tainted Observer

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 two 1/1 Saproling creature tokens.
  2. The Saprolings enter the battlefield, triggering Tainted Observer twice.
  3. Holding priority, activate Ashnod's Altar by sacrificing a Saproling, adding {C}{C}.
  4. Resolve the first Tainted Observer trigger, causing you to pay {2} to put two spore counters on any creature you control.
  5. Resolve the second Tainted Observer trigger, choosing not to pay.
  6. Repeat.

What the combo produces