Ravenclaw's Diadem

You may spend mana as though it were mana of
any color to cast instants and sorceries as long as
equipped creature shares a color with that spell.
Equip {2} ({2}: Attach to target creature you control.
Equip only as a sorcery.)
''While the diadem bestows wisdom, I doubt that it
would greatly increase your chances of defeating Lord
Voldemort''