The new Dragon article "The Art of the Kill" spells it out. There are "true" assassins, they use the shadow power source, they "can step through walls, blend into the stuff of shadows, alter their appearance at
will, and command the gloaming to do their bidding."
Maybe we'll also see a necromancer and an illusionist drawing from the same power source.
will, and command the gloaming to do their bidding."
Maybe we'll also see a necromancer and an illusionist drawing from the same power source.