2nd-level cleric feature
You can expend a use of your Channel Divinity on a creature or object to drive out a creature possessing it. When you do so, you become locked in a battle of wills with the possessor for up to 1 minute. Each round, the possessor must make a Wisdom saving throw against your spell save DC. If the possessor fails three saving throws, it is forcibly removed from the host and is stunned until the end of its next turn. It can’t attempt to repossess the host again for 24 hours. If the possessor fails less than three saves, it remains within its host and is immune to your further attempts to remove it for 24 hours.
You can also use this feature to render a spiritfont whose center is within 5 feet of you dormant. The spiritfont must succeed on an Intensity saving throw against your spell save DC or it becomes dormant for a number of hours equal to your proficiency bonus.