umm...opposite of spellcaster?;P
Actually it's like a Wizard and a Sorcerer.
Wizard is a spellcaster, Sorcerer a spellbinder.
Wizards need magical tools in order to cast spells.
Sorcerers devote their time in order to master the spells and be able to cast them w/o any tools whatsoever. They only need either their mouth, hand...and thought to cast spells..sort of "binding" themselves with the magics.