The honest lie

You layer several enchantments upon yourself that make you firmly believe that everything you say is the truth whether it is or not, giving you advantage on all deception checks for the duration, if you cast this spell on yourself five times with at least three days between each casting, the spell fades and gives you a permanent +4 to all deception checks, however you can only gain this permanent bonus once and it cannot be stacked onto itself.

If this spell has become permanent on you you cannot cast it on yourself, however you can cast it on others with the range being touch, all other effects from the spell are normal except that it can never become permanent no matter how many times you cast it.