Myrium of Fortress Eryas

Artifice 2: {2}{b}. ({2}{b}: Search your library for an
Equipment with converted mana cost 2 or less and put
it onto the battlefield equipped to this creature. Then
put an artifice counter on this creature. Activate this
ability only if this creature doesn't have an artifice
counter on it.)
Those who replace their heads with etherium become
myria, metal warriors devoted to the Esper.