Patron of the Moon + Tiller Engine + Azorius Chancery

Patron of the Moon

Tiller Engine

Azorius Chancery

How it works

1. Pay 1 to activate Patron of the Moon, putting Azorius Chancery from your hand onto the battlefield.
2. When Azorius Chancery enters, it and Tiller Engine each trigger.
3. Resolve Tiller Engine's ability, untapping Azorius Chancery.
4. Activate Azorius Chancery by tapping it, adding two mana.
5. Resolve Azorius Chancery's triggered ability, returning it from the battlefield to your hand.
6. Repeat.