Activate Iron Myr by tapping it, adding {R}.
Activate Myr Galvanizer by paying {1} and tapping it, untapping each other Myr you control.
Activate Clock of Omens by tapping two other Myr artifact creatures you control, untapping Myr Galvanizer.
Repeat.
If you control another Myr that can tap to produce at least {1}, this combo nets infinite mana.

Infinite untap of Myr you control

Infinite mana Myr you control can produce

Myr Galvanizer

Clock of Omens

Iron Myr

Activate Palladium Myr by tapping it, adding {C}{C}.
Activate Iron Myr by tapping it, adding {R}.
Activate Voltaic Construct by paying {2}, untapping Myr Galvanizer.
Activate Myr Galvanizer by paying {1} and tapping it, untapping each other Myr you control.
Repeat.

Palladium Myr

Voltaic Construct

Activate Myr Galvanizer by tapping it, creating a token copy of itself with haste.
Activate Iron Myr by tapping it, adding {R}.
Activate the Myr Galvanizer token by paying {1} and tapping it, untapping each other Myr you control.
Repeat.

Combos with "Iron Myr"