Grovetender Druids + Arcane Adaptation + Phyrexian Altar

Prerequisites

• "Ally" chosen with Arcane Adaptation.

Steps

1. 1Cast Grovetender Druids by paying .
2. 2When Grovetender Druids enters the battlefield, it triggers, causing you to pay to create a 1/1 Plant creature token.
3. 3When the Plant enters the battlefield as an Ally due to Arcane Adaptation, Grovetender Druids triggers.
4. 4Holding priority, activate Phyrexian Altar by sacrificing the Plant, adding .
5. 5Resolve the Grovetender Druids trigger, causing you to pay to create a 1/1 Plant creature token.
6. 6Repeat from step 3.

Effects

• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers