‘Kris’ is a FH Elf mage with powers relating to Darkness, Chaos, and Demonology:
NPC introduces Kris to the group.
Xentos: Oh great. I don’t know if I can handle another elf.
NPC: Oh, Kris isn’t your average happy-go-lucky, moonlight-and-faywine elf.
Kris: I fart darkness.
Another factor to consider is that a super-intelligent character's abilities will largely depend on what areas his super-intelligence has been applied to. For example, Hannibal Lecter has super-skills along the lines of Telepathy, Mind Control, Precognition, etc., insofar as they relate to human motivations and actions (determining them, predicting them, manipulating them, etc.), because he's applied his massive INT to psychology.
In other words, aside from the innate benefits a super-INT might give you in and of itself, any super-intelligent character (unless they're a young child or something) is also likely to have one or more areas of knowledge that they're knowledgeable about. And, thanks to their incredible INT, they're likely to demonstrate astonishing abilities in those areas.