Ghave, Guru of Spores, Metallic Mimic, and Ashnod's Altar

Prerequisites

• Ghave, Guru of Spores on the battlefield
• Metallic Mimic on the battlefield
• Ashnod's Altar on the battlefield
• A creature you control has at least one +1/+1 counter on it
• "Saproling" chosen with Metallic Mimic
• available

Steps

1. Activate Ghave's first ability by paying and removing a +1/+1 counter from a creature you control, creating a 1/1 Saproling creature token
2. The Saproling enters the battlefield with a +1/+1 counter on it due to Metallic Mimic
3. Activate Ghave's first ability by paying and removing a +1/+1 counter from a creature you control
4. Holding priority, activate Ashnod's Altar by sacrificing the Saproling, adding
5. Resolve the Ghave ability, creating a 1/1 Saproling creature token
6. Repeat from step 2
7. Once you have infinite mana, you may forego sacrificing the Saproling tokens and/or sacrifice the Saprolings to Ghave's second ability

Results

• Infinite +1/+1 counters
• Infinite colorless mana
• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers