Dalakos, Crafter of Wonders, Pentavus, Intruder Alarm, and Purphoros, God of the Forge

Prerequisites

• Dalakos, Crafter of Wonders on the battlefield
• Pentavus on the battlefield
• Intruder Alarm on the battlefield
• Purphoros, God of the Forge on the battlefield

Steps

1. Activate Dalakos by tapping it, adding that can only be spent on artifacts or to activate abilities of artifacts
2. Activate Pentavus's first ability by paying , creating a 1/1 Pentavite creature token
3. Creature tokens enters the battlefield, triggering Intruder Alarm, untapping all creatures
4. Purphoros triggers, dealing 2 damage to each opponent
5. Activate Pentavus's second ability by paying and sacrificing a Pentavite, putting a +1/+1 counter on Pentavus
6. Repeat

Results

• Infinite artifact ETB
• Infinite artifact LTB
• Infinite artifact sacrifice triggers
• Infinite damage
• Infinite death triggers
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite mana creatures you control can produce
• Infinite untap of creatures