Myr Galvanizer

The untap line is what separates a tribal lord from a combo engine, and it is the reason Myr decks ask for this in multiples. The anthem half is the ordinary one: every other Myr you control gets bigger, the kind of effect tribal three-drops have offered forever. The activated ability is where the design turns. For one mana it untaps each other Myr you control, so if those untapped Myr can produce more than one mana between them (a board of mana producers like Palladium Myr, or a doubled-up pair of Galvanizers), each activation nets mana instead of burning it. Two Galvanizers untap each other, and with enough mana-producing Myr on board the loop spirals into arbitrarily large colorless mana, the foundation for any Myr-tribal mana sink you care to point it at. That one line promotes a plain lord into the piece a whole archetype is built around. The word "other" is what holds it in check: a lone Galvanizer untaps nothing of itself, so the engine demands a critical mass of supporting Myr before it does anything explosive. It is a careful piece of tribal design, an anthem that doubles as the gas pedal for a self-untapping mana ritual, with the cost of entry being the board you have to assemble first.