Corruption

Targeting one creature with a DC equal to or lower than your level you can see, you attempt to plunge its soul into the corrupting darkness of the Shadowfell. The target must then make a Charisma saving throw against your spell save DC. On a failed save, the target's alignment switches for 1 hour, becoming a darker version of its normal self as its worst traits and impulses take surface. A creature affected this way is unaware of the change taking place until the spell ends. Under the effects of this spell, a chaotic good creature may become chaotic evil, or another evil alignment as the DM determines. These personality changes take place in the target's actions and are not necessarily outwardly obvious.

If the target fails this saving throw by 5 points or more, this spell becomes permanent until dispelled or removed via spells such as remove curse or greater restoration. A evil creature targeted by this spell instead becomes immune to alignment changes for the next 24 hours, and this spell has no effect on chaotic neutral or unaligned creatures. A creature targeted by this spell, regardless of the result, is immune to being targeted again for a week.