Llanowar Scout + Amulet of Vigor + Pemmin's Aura + Azorius Chancery

Llanowar Scout

Amulet of Vigor

Pemmin's Aura

Azorius Chancery

How it works

1. Activate Llanowar Scout by tapping it, putting Azorius Chancery onto the battlefield from your hand.
2. When Azorius Chancery enters the battlefield, it and Amulet of Vigor trigger.
3. Resolve the Amulet of Vigor trigger, untapping Azorius Chancery.
4. Activate Azorius Chancery by tapping it, adding .
5. Resolve the Azorius Chancery trigger from step 2, returning it to your hand from the battlefield.
6. Activate Pemmin's Aura's first ability by paying , untapping Llanowar Scout.
7. Repeat.

This elegant engine transforms a simple tap ability into a self-sustaining loop by using Amulet of Vigor to instantly ready the lands that enter. When Llanowar Scout drops Azorius Chancery straight from your hand, Amulet of Vigor's trigger untaps the bounce-land so you can immediately tap it for blue and white mana. Azorius Chancery's own triggered ability then returns itself safely to your hand, while Pemmin's Aura uses a sliver of that generated mana to untap Llanowar Scout and start the cycle all over again.