Curse of Cassandra

You point at a creature in range and doubts the validity of its words. The target is forced to make a Charisma save. On a failed save, the target is affected by this spell. The target automatically succeeds on the check if it is under the influence of a Zone of Truth spell or some other similar effect.

For the duration, the target gains disadvantage on any Charisma rolls it makes, and failing a Charisma check convinces other creatures that the target is being untruthful. In addition, any spell effect that reveals whether a creature is truthful indicate that your target is lying, regardless of whether it actually is, in fact, lying. However, the target also gains a +1 to any rolls it makes to discern the truth or gain information while this spell is active.

The effects of this spell is suspended while the target is inside the area of a Zone of Truth spell, or any other effect that would render it unable to lie. This spell is also dispelled if Greater Restoration or some other similar curse-removing effect of equal or higher level than this spell is cast on the target.

At higher levels. For each level above 4th that you cast this spell as, the maximum duration of that casting is extended by 1 hour. Additionally, if you cast this spell at 9th level, the target makes an extra Charisma save with advantage. If the target fails the additional save, the effects of this spell lasts until dispelled.