Ghave, Guru of Spores, Young Wolf, and Cryptic Trilobite

Prerequisites

• Ghave, Guru of Spores on the battlefield
• Young Wolf on the battlefield
• Cryptic Trilobite on the battlefield
• Cryptic Trilobite has at least two +1/+1 counters on it

Steps

1. Activate Cryptic Trilobite's first ability by removing a +1/+1 counter from it, adding that can only be spent to activate abilities
2. Activate Ghave's second ability by paying and sacrificing Young Wolf
3. Young Wolf's undying ability triggers, returning it to the battlefield with a +1/+1 counter on it
4. Resolve the Ghave ability, putting a +1/+1 counter on Cryptic Trilobite
5. Activate Ghave's first ability by paying and removing a +1/+1 counter from Young Wolf, creating a 1/1 Saproling creature token
6. Repeat

Results

• Infinite colorless mana that can only be spent to activate abilities
• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers