Derevi, Empyrial Tactician + Emiel the Blessed + Axebane Guardian

Derevi, Empyrial Tactician

Emiel the Blessed

Axebane Guardian

How it works

1. Activate Axebane Guardian by tapping it, adding at least three mana of any color.
2. Activate Emiel by paying 3, blinking Derevi.
3. When Derevi enters the battlefield, it triggers, untapping Axebane Guardian.
4. Repeat.

This clever loop centers around Axebane Guardian, whose ability to tap for mana scales with your defenders—though here, its primary role is simply serving as the generator for our engine, provided it produces at least three mana per tap. We fuel Emiel the Blessed's blink ability using that mana to repeatedly exile and return Derevi, Empyrial Tactician to the battlefield. Each time Derevi enters, its triggered ability untaps Axebane Guardian, creating a self-sustaining loop that yields infinite mana of any color and infinite entry-and-exit triggers.