Name: Alister Cromwell, Agent of the firemind
Age: unknown
Race: human/elemental
Mana alignment: blue red with a black/white hybrid. 
Type of magic: dabbles in a bit of everything but stays away from green mana most of the time. Lately he has been bringing artifacts to life and using them to do his work for him.
Weapons: he uses his izzet guildmage suit that is equiped with blasters that fire out blue and red magics. Secondly he discovered a large screw on the plane of mirrodin that he modified to be a rapier. 
Home plane: Ravnica but is partial to mirrodin once he discovered its artifacts.
Spark: Alister received his spark through an accident. He was messing around with an experiment and wound up getting a calculation wrong. Suddenly he was on another plane. Stranded on a shiny new world and creatures made of metal he began his journey amd learned what he had become. He began to collect some of these creatures and finally made it back home to tell the firemind all he had seen. He now works for the firemind hunting down new knowledge for him. He also has a slight problem due to the experience of being a planeswalker. A mix of white and black made has seeded inside him because of an artifact that he carries with him now but he doesn't know that new powers are just about to emerge and throw him into a whole new realm of possibilities. 
Appearance: Alister wears a red and blue trench coat that shifts between the two colors in the light. Due to him being half elemental his skin is almost translucent in which you can see the mana lines in his body. Also due to this he can shift his Appearance by using his blue mana. Only taking humanoid forms though because he is unsure if he can or wants to change into an animal. Under the coat he wears a suit thst conducts his natural mana that then convert into the blasters that are equipped to his hands. The suit lets of steam every once in a while to equalize the mana flow as it is a bit unstable. Hair changez from a cool blue to a fire red and eyes around the iris do as well. 

Any questions or holes I need to fill in?