Yarok, the Desecrated, Evolution Sage, Life and Limb, and Sporoloth Ancient

Prerequisites

• Yarok, the Desecrated on the battlefield
• Evolution Sage on the battlefield
• Life and Limb on the battlefield
• Sporoloth Ancient on the battlefield
• Sporoloth Ancient has at least three spore counters on it

Steps

1. Activate Sporoloth Ancient by removing two spore counters from it, creating a 1/1 Saproling creature token
2. When the Saproling enters the battlefield as a Forest land due to Life and Limb, Evolution Sage triggers twice, putting two spore counters on Sporoloth Ancient
3. Repeat

Results

• Infinite creature tokens
• Infinite ETB
• Infinite landfall triggers
• Infinite proliferate