Saea of the Artificer's Guild

If an effect would create one or more non
creature artifact tokens under your control, it
creates twice that many of those tokens instead.
{3}, {t}: Create a tapped Powerstone token. (It's
an artifact with "{t}: Add {c}. This mana can't be
spent to cast a nonartifact spell.")
Guildmaster (You can have a Background or
another creature with partner as a second
commander.)