1 bonus action
Up to 1 minute
When cast upon your melee weapon, the weapon becomes sheathed in icy holy water. For the duration of the spell, your melee weapon attack deals an extra 4d8 cold damage, plus an additional 2d6 radiant damage if the target is a fiend or undead.
When you cast this spell using a spell slot of 5th level or higher, the cold damage increases by 1d8 for every slot level above 4th.