Patron of the Moon + Tiller Engine + Selesnya Sanctuary

Patron of the Moon

Tiller Engine

Selesnya Sanctuary

How it works

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