Siberys
Adventurer
To be frank, that sounds less like a problem with the mage and more with the player. :/
Remember the limitations of his abilities and play up their consequences. Maybe the other players accept it because they think there's nothing to be done about it? An NPC unwilling to put up with his BS might inspire the other characters.
Worse comes to worst, talk with him about it. If that doesn't work, talk with the /other/ players about it. And if that doesn't work, well, it's better not to play with someone than to play and get mad about it.
Remember the limitations of his abilities and play up their consequences. Maybe the other players accept it because they think there's nothing to be done about it? An NPC unwilling to put up with his BS might inspire the other characters.
Worse comes to worst, talk with him about it. If that doesn't work, talk with the /other/ players about it. And if that doesn't work, well, it's better not to play with someone than to play and get mad about it.