Solipsism (Su): At 1st level, whenever the enigma uses hypnotic stare on a creature, instead of applying a penalty on the creature’s saving throws, the enigma begins to fade from the creature’s view. Until the enigma’s next turn, the enigma gains the effects of concealment against that creature (unless it can see invisible creatures). Starting on the enigma’s next turn, he gains the effect of invisibility against that creature. These effects last as long as the enigma continues to use his hypnotic stare, but if he takes an action that would end invisibility, it ends his hypnotic stare immediately. The enigma can reinstate this effect whenever he wishes, but each time it begins with 1 round of concealment. At 8th level, attacks that would end invisibility do not end the enigma’s hypnotic stare, and after 1 round of concealment, he gains the benef its of greater invisibility against the target of his stare. For the purpose of bold stare improvements, the enigma’s hypnotic stare always has a penalty of –1.
And
All offensive combat actions, even those that don’t damage opponents, are considered attacks. Attempts to channel energy count as attacks if it would harm any creatures in the area. All spells that opponents resist with saving throws, that deal damage, or that otherwise harm or hamper subjects are attacks. Spells that summon monsters or other allies are not attacks because the spells themselves don’t harm anyone.
So, how this work?
A invisible mesmerist using Solipsism stare, break invisibility?