These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
The Morgawr is the Big Bad of the trilogy. He's a half man, half lizard freak who slaughters Grianne and Bek Ohmsfords' family, kidnaps Grianne, tells her Bek is dead, and convinces her that Walker, the Druid, and his Arch-Enemy is behind it, then raises her to be as bad as himself. He's also a magic-draining leech who feeds on the souls, minds, and magics of his victims and turns people into People Puppets by pulling their brains out through the back of their heads and eating them, leaving them with their skills, but no free will. In the opening pages of Morgawr he drains two-hundred fifty men onscreen, scarring witness Sen Dunsidan for life, and driving the latter's Torture Technicianto suicide. He later does the same to the crew of Grianne's ship, Black Moclips after she betrays him, before hunting her down and trying to kill her because he considers her life his property to dispose of how he wishes. Completely comfortable with his evil, The Morgawr takes pride in having brought Grianne down to his level, and finds her desire to better herself completely laughable.
Nightmare Fuel: The Morgawr, Antrax's wronks, the caulls, and Truls Rohk's true form can all fall into this. The opening sequence of Morgawr where Sen Dunsidan watches the Morgawr feed on hundreds of innocent men is especially memorable in this regard.