Ghirapur Aetherworks

{t}: Add {c} to your mana pool.
{6}, {t}: Create a 1/1 colorless Thopter artifact creature token with flying.
{t}, Tap X untapped artifacts you control:
Search your library for an artifact card with converted mana cost X, reveal it, and put it into your hand. Then shuffle Ghirapur Aetherworks into your library. X can't be 0.