The Prismatic Piper, Rakdos, Lord of Riots, Warstorm Surge, and Phyrexian Altar

Prerequisites

• The Prismatic Piper in the command zone
• Rakdos, Lord of Riots on the battlefield
• Warstorm Surge on the battlefield
• Phyrexian Altar on the battlefield
• You are able to cast The Prismatic Piper for due to Rakdos

Steps

1. Cast The Prismatic Piper from the command zone by paying
2. Warstorm Surges triggers, dealing 3 damage to any target opponent
3. Activate Phyrexian Altar by sacrificing The Prismatic Piper, adding one mana of any color
4. Choose to have The Prismatic Piper return to command zone
5. Repeat

Results

• Infinite colored mana
• Infinite commander casts
• Infinite damage
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers