Myr Propagator + Mana Echoes + Fervor

Myr Propagator

Mana Echoes

Fervor

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 clever loop turns a modest mechanical replica into an engine for infinite growth by letting Mana Echoes scale your colorless mana output exponentially with each new copy that hits the board. Because Fervor grants your creatures haste, the newly created Myr Propagator token doesn't have to wait around to join the fray—it can immediately tap to pay for its own propagation, fueling the next iteration of the loop. Each cycle leaves you with an ever-growing army of Myr Propagator tokens and a massive surplus of colorless mana.