[quote=@Light]
[@TheUnknowable]
Character Sheet updated to detail each school of magic. He will not be using the (healing) subschool of Conjuration at all. But it is a subschool that exists.

The process of raising dead in Mym can be very different than Adamar's home plane. This is your world, and the machinations of such magic is entirely up to you.

As for telling people about his necromancy, he would be used to such practices being taboo in his home plane. He would not be quick to divulge such secrets to newcomers on Mym.
[/quote]

Magic on Mym on much more innate, and more difficult to use, as the magical energy of the world is more erratic and in constant flux.  Magic such as he used on his homeworld seems like it would tap into powerful flows of magic, rivers if you will.  On this world however, the magic is subject to incursions from other worlds which constantly disrupt it.  Instead of rivers, you get puddles, or tiny streams, maybe even weak whirlpools.

Casting large-scale spells would require that you create an artificial pool of energy to tap into by tying multiple sources together.  These sources could be location based, or be tied to objects/herbs/ingredients/etc.

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If we went with the above description it would limit his powers to whatever sources he could find, keeping him from going OP despite the technical fact that he's insanely powerful.  Would it work with your character idea, though?