Ganax, Astral Hunter, Goro-Goro, Disciple of Ryusei, Mana Echoes, and Miirym, Sentinel Wyrm

Prerequisites

• Ganax, Astral Hunter in hand
• Goro-Goro, Disciple of Ryusei on the battlefield
• Mana Echoes on the battlefield
• Miirym, Sentinel Wyrm on the battlefield
• You control a modified creature that can attack this turn
• available

Steps

1. Cast Ganax by paying
2. When Ganax enters the battlefield, it triggers itself, Mana Echoes and Miirym
3. Resolve the Mana Echoes trigger, adding at least
4. Resolve the Ganax trigger, creating a Treasure token
5. Resolve the Miirym trigger, creating a nonlegendary token copy of Ganax
6. When the token Ganax enters the battlefield, it triggers itself, the nontoken Ganax, and Mana Echoes
7. Resolve the Mana Echoes trigger, adding at least
8. Resolve both Ganax triggers, creating two Treasure tokens
9. Move to your combat phase, and declare any modified creature you control as an attacker
10. Holding priority, activate three Treasures by tapping and sacrificing them, adding
11. Activate Goro-Goro's second ability by paying , creating a 5/5 Dragon Spirit creature token with flying
12. When the Dragon Spirit enters the battlefield, it triggers Mana Echoes and both Ganax
13. Resolve the Mana Echoes trigger, adding at least
14. Resolve both Ganax triggers, creating two Treasure tokens
15. Activate the Treasures by tapping and sacrificing them, adding
16. Repeat from step 11
17. Once you have infinite tokens, you may use Goro-Goro's first ability to give them haste

Results

• Infinite colorless mana
• Infinite creature tokens with haste
• Infinite ETB