Halo Fountain + Intruder Alarm + Ensoul Artifact

Halo Fountain

Intruder Alarm

Ensoul Artifact

How it works

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.

This charming loop transforms a humble artifact into a self-sustaining engine by turning **Halo Fountain** into a creature using **Ensoul Artifact**, allowing it to tap for mana. Once animated, you can tap it to pay for its own first ability, creating a Citizen token that immediately triggers **Intruder Alarm** upon entry. The resulting mass untap wakes up your newly minted artifact creature and any other mana producers you control, resetting the entire process to generate infinite mana, tokens, and enter-the-battlefield triggers.