Divine Awareness

The creature knows if it hears a lie. (Planetar, pp. 17, MM) Divine Eminence
As a bonus action, the creature can expend a spell slot to cause its melee weapons to magically deal an extra X radiant damage to the target on a hit. This benefit lasts until the end of the turn. If the creature expends a spell slot of 2nd level or higher, the extra damage increases by Y for each level above 1st. (Priest, pp. 348, MM)