Deep Shadow

You touch one object that is no larger than 10 feet in any dimension. Until the spell ends, the object is shrouded in magical darkness in a 10-foot radius sphere and mundane darkness for an additional 10 feet. Completely covering the object with something opaque blocks the darkness. The spell ends if you cast it again or dismiss it as an action.

If you target an object held or worn by a hostile creature, that creature must succeed on a Dexterity saving throw to avoid the spell.