Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Intruder Alarm + Kor Skyfisher

Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight

Intruder Alarm

Kor Skyfisher

How it works

1. Cast Kor Skyfisher by paying its mana cost reduced by the number of creatures you can tap while casting it.
2. When Kor Skyfisher enters, it and Intruder Alarm trigger.
3. Resolve the Kor Skyfisher trigger, returning it from the battlefield to your hand.
4. Resolve the Intruder Alarm trigger, untapping all creatures.
5. Repeat.