Truth Seeker

Cantrip (This spell consumes no mana, but can
only be cast if you have at least 1 mana available
of the corresponding color. Only 1 spell with
Cantrip can be active at a time).
You get a higher chance of knowing if someone is
lying, and have Advantage on Rolls for Perceiving
lies.
Now, tell me the truth; I'll now if you are lying, ok?