Grovetender Druids, Arcane Adaptation, and Ashnod's Altar

Prerequisites

• Grovetender Druids in hand
• Arcane Adaptation on the battlefield
• Ashnod's Altar on the battlefield
• "Ally" chosen with Arcane Adaptation
• available

Steps

1. Cast Grovetender Druids by paying
2. When Grovetender Druids enters the battlefield, it triggers, causing you to pay to create a 1/1 Plant creature token
3. When the Plant enters the battlefield as an Ally due to Arcane Adaptation, Grovetender Druids triggers
4. Holding priority, activate Ashnod's Altar by sacrificing the Plant, adding
5. Resolve the Grovetender Druids trigger, causing you to pay to create a 1/1 Plant creature token
6. Repeat from step 3
7. Once you have infinite mana, you may forego sacrificing the Plants

Results

• Infinite colorless mana
• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers