Myr Propagator + Mana Echoes + Maelstrom Wanderer

Myr Propagator

Mana Echoes

Maelstrom Wanderer

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 loop takes advantage of the exponential scaling of Mana Echoes alongside the self-replicating ability of Myr Propagator to generate a massive mechanical engine. Because Mana Echoes rewards you with colorless mana equal to the total number of creatures sharing a type with each new arrival, every iteration of Myr Propagator's token generation yields more than enough mana to immediately pay for the next activation. Meanwhile, Maelstrom Wanderer provides the crucial static buff that grants all your creatures haste, ensuring that your newly minted army can tap the very turn they arrive without waiting around.