At 5th level, the mesmerist can have two tricks implanted at a time. The number of concurrent tricks increases by one for every 4 mesmerist levels he possesses beyond 5th. Each creature can still be the subject of only one trick at a time. If the mesmerist implants a new trick while he already has his maximum number of concurrent tricks implanted, he must choose one implanted trick to dismiss without triggering (the dismissed trick still expends a daily use of the mesmerist's tricks).