Here is the latest excerpt from our FAQ which should be downloadable tonight:

Restricted Spells
If a spell is restricted to a particular Mage or school of training, it refers to two things:
1)   Placing that spell in that Mage’s spellbook when building their spellbook before the game begins.
2)   Controlling or using that spell during the course of the game.
Examples:
•   If the Forcemaster casts Steal Equipment, she can target a Warlock’s Lash of Hellfire, which has the Warlock Only trait. However, since she cannot use this spell, it is destroyed instead.
•   Steal Enchantment cannot be used to take control of an enchantment you might otherwise be restricted from. For example, the Wizard cannot take control of a Forcemaster’s Forcefield.
•   If the Priestess steals a Mage Wand with a Drain Life spell bound to it, she cannot use cast that spell. She can steal the wand, but the wand would be of no use to her unless she chooses to bind a new spell to it.
•   The Forcemaster cannot cast Mind Control a Huginn, Raven Familiar because it is Wizard Only.