The Tolkien Monster Encyclopedia
by Calle Mattsson
This page is devoted to all the monsters and races belonging to darkness.
Here you will find Orcs, Goblins, Balrogs and many more fearsome creatures.

Olog-Hai are a sort of troll created by Sauron. They are bigger, stronger and much cleverer than ordinary trolls. They endure sunlight unlike common trolls. When the ring was destroyed they became helpless and most were slain.