If cartman farted and lighted it. It would be a technique that required technology/equipment (Lighter). If Lucca lighted it well it would be a little diff. the fart would be enchanced by the magic and it and it would steal be a technique. But what would make the damage ? The fart or the fire ?

Jean Grey, Professor X and Magneto have power related to psychic powers.

As for fantastic four i have no clue what that is. If i knew whatever that was i could tell you. Anyway, if you wanna discuss more about this subject you should make a new thread.