Ganax, Astral Hunter, Orthion, Hero of Lavabrink, and Umbral Mantle

Prerequisites

• Ganax, Astral Hunter on the battlefield
• Orthion, Hero of Lavabrink on the battlefield
• Umbral Mantle on the battlefield
• Orthion does not have summoning sickness
• Umbral Mantle attached to Orthion
• available

Steps

1. Activate Orthion's second ability by paying and tapping it, creating five token copies of Ganax with haste
2. Put all Ganax tokens into your graveyard due to the legend rule
3. Each Ganax triggers five times
4. Resolve all Ganax triggers, creating 30 Treasure tokens
5. Activate twelve Treasures by tapping and sacrificing them, adding
6. Activate Orthion by paying and untapping it, giving it +2/+2 until end of turn
7. Repeat
8. Once you have infinite mana, you may instead target any other creature using Orthion's ability

Results

• Infinite colored mana
• Infinite copies of creatures you control
• Infinite creature tokens with haste
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinitely large Orthion until end of turn
• Infinite sacrifice triggers
• Infinite Treasure tokens