Myr Propagator + Mana Echoes + Fires of Yavimaya

Myr Propagator

Mana Echoes

Fires of Yavimaya

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 sparkling loop turns an unassuming token-maker into a self-sustaining engine by exploiting the compounding math of creature types. While Fires of Yavimaya grants your initial Myr Propagator the haste it needs to get cracking right away, the true core of the magic lies in Mana Echoes; every time a new Myr clone enters the battlefield, that enchantment floods your pool with colorless mana whose amount scales exponentially with each iteration. Because Myr Propagator demands only three mana to replicate itself, the ever-increasing payouts from Mana Echoes quickly outstrip the activation cost, leaving you with boundless colorless mana and an endless swarm of identical mechanical echoes.