Sporoloth Ancient + Tainted Observer + Ashnod's Altar + Parallel Lives

Prerequisites

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

Steps

1. 1Activate a creature you control by removing two spore counters from it, creating two 1/1 Saproling creature tokens.
2. 2The Saprolings enter the battlefield, triggering Tainted Observer twice.
3. 3Holding priority, activate Ashnod's Altar twice by sacrificing the Saprolings, adding .
4. 4Resolve both Tainted Observer triggers, causing you to pay to put two spore counters on any creature you control.
5. 5Repeat.

Effects

• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite proliferate