Ra'zac

The Ra'zac (or Lethrblaka when full-grown) were one of the several ancient races that were thought to have followed the humans across the sea to Alagaësia. They were a race that fed on humans and likely came from the same homelands. Ra'zacs' breath have the power to paralyze humans in a dream-like state, however, it barely clouds the minds of dwarves and is ineffective against elves altogether.

The last two Ra'zac to live before the extinction of their race in Alagaësia (as well as the remaining two Lethrblaka) were servants of Galbatorix, living in their black towers at Helgrind. They were used by King Galbatorix to investigate any rumors of dragons who might have escaped the downfall of the Dragon Riders. They were called by some the king's personal "dragon hunters." They were especially effective against Dragon Riders because their minds were shielded from mental powers.

Unbeknownst to the main characters, Galbatorix hid several Ra'zac eggs throughout Alagaësia, though the only ones found were beneath Dras-Leona. These two were destroyed and killed shortly after hatching by Eragon and Solembum, a Werecat.

The Ra'zac commonly used Seithr Oil and with it murdered Garrow, Parr and countless others. The Ra'zac used bows and arrows usually coated in Seithr Oil. They also used ancient leaf-bladed swords. They had probably been using the swords against their enemies for years without them breaking, in which case the blades would have to be either stolen from elves or heavily enchanted. This enchanting would need to be done so by a very skilled enchanter, since ordinary blades augmented with magicfor durability require a magician to renew the spells protecting them and the Ra'zac cannot use magic. There was a taller and smaller Ra'zac (this could correspond with age or gender). The last of the Ra'zac hid in Helgrind and were warded by Galbatorix's spells. They kept both Seithr Oil and torture devices inside their lair. The Ra'zac are known to be mortally afraid of water and the sun, as they cannot swim and sunlight burns their skin and eyes.