Myrok, Myr Converter

Eminence:—mana produced by lands and noncreature artifacts you controll is colorless and
each artifact spell and ability has improvise
{w}{u}{b}{r}{g}: create an 1/1 Myr token for each artifact creature that enteret the battlefield
this turn
sacrifice an artifact: create X 1/1 Myr token X
was its converted mana cost
Myr is Power created from Steel