Eupho, Eternally Blinded

Eupho enters the battlefield tapped. Whenever a player copies an instant or sorcery spell, you may tap or untap target artifact.
{c}{u}, {t}, Discard a noncreature, nonland card: Counter target creature spell. Activate this ability only once each turn.
{c}{r}, {ut}, Discard a noninstant, nonsorcery, nonland card: Copy target instant or sorcery spell. You may choose new targets for the copy. Activate this ability only once each turn.