Ghave, Guru of Spores, Rosie Cotton of South Lane, and Ashnod's Altar

Prerequisites

• Ghave, Guru of Spores on the battlefield
• Rosie Cotton of South Lane on the battlefield
• Ashnod's Altar on the battlefield
• Ghave has at least two +1/+1 counters on it
• available

Steps

1. Activate Ghave's first ability by paying and removing a +1/+1 counter from it, creating a 1/1 Saproling creature token
2. Rosie triggers, putting a +1/+1 counter on Ghave
3. Activate Ashnod's Altar by sacrificing the Saproling, adding
4. Repeat
5. Once you have infinite mana, you may forego sacrificing the Saproling tokens to Ashnod's Altar, and then use Ghave's second ability to put infinite +1/+1 counters on creatures you control

Results

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