The Rahabim clan - the descendants of the vampire lieutenant Rahab - featured in Soul Reaver. While Raziel suffered in the Abyss, they experienced a remarkable and beneficial evolution. They became amphibious.
Nosgothic vampires, young and old, were characteristically vulnerable to water. It burned their flesh like acid. The Rahabim appear to have been unique in overcoming this weakness. Not only could they withstand contact with the water - they actually thrived in it. Their bodies had become streamlined (with an unusual cobra-like hood), and they were proficient swimmers. While swimming, they displayed fins on their lower legs, presumably for stabilization, and they circled and attacked their prey like sharks. The Rahabim evolved in underwater cocoons, anchored to the floor or river bed.
Raziel encountered the Rahabim when he visited the Drowned Abbey - their territory - to find Rahab. Some of them had strayed from their domain, so Raziel could also meet them in the Water Glyph area, and it was possible to lure them back into the Razielim territory. Exploiting Nosgoth's waterways, the Rahabim had the potential to be the most widespread of the clans, but a drawback of their evolution prevented it: the clan could not tolerate sunlight. They could only survive Nosgoth's weak daylight if they were sheltered by a roof or submerged underwater. Even the adults would burst into flames if exposed to it.
It was possible to distinguish the adult Rahabim from the fledglings by looking at their markings. The fledglings were plain, but the adults had decorative designs all over their body and hood. They appeared to wear jewellery too - they had gold bands around their wrists, ankles and upper arms.
Raziel used sunlight to kill Rahab. Devouring Rahab's soul enabled Raziel to swim, and therefore face the Rahabim on a more equal footing. Even so, they still had a great advantage over him in the water. On land, they were easier to overcome, but they often struck their enemies from a distance using projectiles. At first glance, one might assume these were identical to the Turelim 'Telekinetic Force Projectiles', but this is not the case. The Necronoir (a LoK fan whose Soul Reaver map can be found on this site) pointed out that they look completely different. The Rahabim projectiles were blue rather than being colourless compressed space, and they did not have the light-bending effect of the Raziel/Turelim projectiles.
This difference in projectile appearance - and the idea that the Rahabim projectile may have been highly compressed water - was discussed further by members of the Nosgothic Realm Forums . It was suggested that the Rahabim may have been behaving like spitting fish (e.g. Archer Fish
), and their attack was designed to stun their human prey, or knock them into Rahabim-filled waters, rather than causing much direct damage. It is impossible to be certain of the projectile's nature, however: it was noted that Raziel was still injured by the projectile after gaining water immunity. Whatever, there seemed to be a consensus that the Rahabim and Turelim projectiles were different; the Rahabim attack was likely not telekinetic at all, and therefore (amongst Kain's offspring) telekinesis was an evolutionary trait likely unique to the Turelim.