You invoke a holy (or unholy) blessing upon a 30-foot cube area within range. Until the spell ends, water within the area is sanctified. Choose up to two of the following types of creatures: celestials, elementals, fey, fiends, or undead.

When a creature of the chosen type starts its turn within the sanctified water or enters it for the first time on a turn, it must make a Constitution saving throw. On a failure, it takes 3d6 radiant damage and has disadvantage on any attack rolls it makes before the start of its next turn. On a success, it takes half damage and suffers no other effects.

When sanctified water is transformed into Holy Water, the ritual to do so only takes 1 minute.

At Higher Levels. When you cast this spell using a spell slot of 4th or 5th level, the duration increases to 8 hours. When you cast this spell using a spell slot of 6th or 7th level, the duration increases to 24 hours. When you cast this spell using a spell slot of 8th level or higher, the duration increases to 7 days, and if you cast the spell in this way on the same spot once every 7 days for a year, it becomes permanent.