Ultimate Adventurer's Handbook
Speak True
0-level (Cantrip) Divination
Casting Time: 1 bonus action
Range/Area: Self
Components: V, S
Duration: 1 minute
When you cast this spell, your honest intentions become clearer to those around you. When a creature makes a Wisdom (Insight) ability check to determine whether or not you are telling the truth for the duration, it adds a bonus equal to your spellcasting ability modifier to its roll.