Myr Matrix, Chromatic Orrery, Dross Scorpion, and Ashnod's Altar

Prerequisites

• Myr Matrix on the battlefield
• Chromatic Orrery on the battlefield
• Dross Scorpion on the battlefield
• Ashnod's Altar on the battlefield

Steps

1. Activate Chromatic Orrery's first ability by tapping it, adding
2. Activate Myr Matrix by paying , creating a 1/1 Myr artifact creature token
3. Activate Ashnod's Altar by sacrificing the Myr, adding
4. The Myr dies, triggering Dross Scorpion, untapping Chromatic Orrery
5. Repeat
6. Once you have infinite mana, if you control a colored permanent, you may activate Chromatic Orrery's second ability instead to draw infinite cards

Results

• Infinite card draw
• Infinite colored mana
• Infinite colorless mana
• Infinite creature tokens
• Infinite death triggers
• Infinite draw triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite untap of artifacts