Unctus, Grand Metatect (Step and Compleat Foil)

Other blue creatures you control have 'Whenever this creature becomes tapped, draw a card, then discard a card.'
Other artifact creatures you control get +1/+1.
{U/P}: Until end of turn, target creature you control becomes a blue artifact in addition to its other colors and types. Activate only as a sorcery. ({U/P} can be paid with either {U} or 2 life.)