Volo, Guide to Monsters, Errant, Street Artist, and Intruder Alarm

Prerequisites

• Volo, Guide to Monsters on the battlefield
• Errant, Street Artist on the battlefield
• Intruder Alarm on the battlefield
• Any creature in hand that does not share a creature type with a creature you control or in your graveyard
• You control creatures that can tap to add at least
• Enough mana available to cast the creature spell

Steps

1. Cast a creature spell by paying its mana cost
2. Volo triggers, copying that spell
3. Tap creatures to add at least
4. Pay and tap Errant to activate her, copying the copied creature spell
5. Let one copy of the creature spell resolve
6. Intruder Alarm triggers, untapping all creatures
7. Repeat from step 3

Results

• Infinite colored mana
• Infinite creature tokens
• Infinite ETB