Derevi, Empyrial Tactician + Emiel the Blessed + Heronblade Elite

Derevi, Empyrial Tactician

Emiel the Blessed

Heronblade Elite

How it works

1. Activate Heronblade Elite 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 Heronblade Elite.
4. Repeat.

This engine relies on Heronblade Elite to generate a surplus of mana, its power boosted to at least three so its tap ability yields enough to fund the loop. Emiel the Blessed acts as the blink engine, utilizing that generated mana to exile Derevi, Empyrial Tactician and return it instantly to the battlefield. Every time Derevi enters, its triggered ability untaps Heronblade Elite, resetting the dork so you can tap it again for infinite colored mana.