Recurring Nightmare, Phyrexian Altar, and Myr Battlesphere

Prerequisites

• Recurring Nightmare on the battlefield
• Phyrexian Altar on the battlefield
• Myr Battlesphere in the graveyard
• You control at least one creature

Steps

1. Activate Recurring Nightmare by sacrificing a creature and returning it from the battlefield to your hand, returning Myr Battlesphere from your graveyard to the battlefield
2. When Myr Battlesphere enters the battlefield, it triggers, creating four 1/1 Myr artifact creature tokens
3. Activate Phyrexian Altar three times by sacrificing Myr Battlesphere and two Myrs, adding
4. Cast Recurring Nightmare by paying
5. Repeat

Results

• Infinite colored mana
• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite storm count