i have a question i am on the fence about. one of my players is planning on playing a tattooed sorcerer/tattooed mystic(paths of prestige) based around illusion. he is planning on taking the illusion tattoo (from the above prestige class)three times to gain invisibility while concentrating on an illusion spell. he is also taking the Shadow Gambit feat (from inner sea magic) to complement this. now i know that when he uses this feat that it ends the spell. my questions are this
1.) would this illusion "attack" for lack of a better term break the invisibility. i am inclined to say yes but i am unsure of it.
2.) when would the invisibilty provided by the spell end? immediately when the spell ends. or, providing that the answer to question 1 is no, does it end at the beginning of the next turn.
3.) how would the invisibility ability work in relation to ending one concentration based spell and immediatly casting another