The behemoth is simply a normal unit with no spellcasting ability. There's no "behemoth master", and the mage that summoned the behemoth doesn't lose his ability to cast spells: A Behemoth is an entirely seperate unit consisting, thematically, of the undead elephant with a mage riding on it: It's just like a knight or heavy cavalry. The blurb text about not being able to cast spells basically is meaningless fluff that exists only to justify why the mage on the behemoth has no spellcasting capability (because he's not a commander, he's a normal unit).
Technically, you can GoR a Behemoth, and then empower it so it CAN cast spells.
Re: The Behemoth
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