Revocation spell

Before attempting an invocation, the more important is to be able to revoke the creature you have summoned.
It’s a very easy spell which can be cast aloud or muted in your head. The second option is more discreet but need to have a very clear though. The spell consumes a little amount of mana; think about resting well.
The formula of this spell is famous since a political leader fails to use it on an uninvited creature: “Kas Toi Pauv Con” So you may remember it easily.