Ashaya, Soul of the Wild, Patron of the Orochi, Thespian's Stage, and Arbor Elf

Prerequisites

• Ashaya, Soul of the Wild on the battlefield
• Patron of the Orochi on the battlefield
• Thespian's Stage on the battlefield
• Arbor Elf on the battlefield

Steps

1. Activate all Forests and all mana-producing green creatures you control by tapping them, adding at least
2. Activate Thespian's Stage's second ability by paying and tapping it, causing it to become a copy of Patron of the Orochi
3. Put Patron of the Orochi into your graveyard due to the legend rule
4. Activate Arbor Elf by tapping it, untapping Thespian's Stage
5. Activate Thespian's Stage using Patron of the Orochi's ability by tapping it, untapping all Forests and all green creatures
6. Activate all Forests and all mana-producing green creatures you control by tapping them, adding at least
7. Activate Thespian's Stage using its own ability by paying and tapping it, causing it to become a copy of itself, which causes it to become a copy of Patron of the Orochi
8. Repeat from step 4
9. If Forests and/or green creatures you control can tap to produce at least , this combo nets infinite mana

Results

• Infinite mana creatures you control can produce
• Infinite untap of Forests
• Infinite untap of green creatures