Flourite, Off Color Engineer

Mechanic {u}{r/g}{w/b} (Pay {u}{r/g}{w/b} and tap this
creature: Regenerate target vehicle or noncreature
artifact.)
{w}{u}{b}{r}{g}, {t}: Exile this creature and
another target nontoken gem creature you
control. Create a creature token that has the
combined colors, creature types, power,
toughness and keyword abilities of the exiled
creatures. Return the exiled cards to their
owners control when the token leaves the
battlefield. Activate only as a sorcery.