Myr Propagator + Mana Echoes + Tuktuk Rubblefort

Myr Propagator

Mana Echoes

Tuktuk Rubblefort

How it works

1. Activate Myr Propagator by paying 3 and tapping it, creating a token copy of it.
2. When the Myr Propagator token enters the battlefield, Mana Echoes triggers, adding C for each Myr you control.
3. Repeat using the Myr Propagator token instead.

This delightful loop is fueled by Tuktuk Rubblefort, whose static ability grants all your creatures haste so your freshly minted tokens don't have to suffer from summoning sickness. Once the field is ready, you activate Myr Propagator to clone itself, which immediately wakes up Mana Echoes and generates a surge of colorless mana based on how many Myrs you now control. Because you make more mana than the activation cost requires—and because the new token can immediately tap to repeat the process—you can snowball an entire army of metallic followers and boundless colorless energy.