Halo Fountain, Intruder Alarm, and Ensoul Artifact

Prerequisites

• Halo Fountain on the battlefield
• Intruder Alarm on the battlefield
• Ensoul Artifact on the battlefield
• Halo Fountain does not have summoning sickness
• You control a creature that can tap to produce at least
• Ensoul Artifact attached to Halo Fountain

Steps

1. Activate a creature you control by tapping it, adding
2. Activate Halo Fountain's first ability by paying , tapping and untapping it, creating a 1/1 Citizen creature token
3. When the Citizen enters the battlefield, Intruder Alarm triggers, untapping all creatures
4. Repeat

Results

• Infinite creature tokens
• Infinite ETB
• Infinite mana creatures you control can produce
• Infinite untap of all creatures