THE REAVER
The Reaver, before it becomes the Soul reaver and before its enhanced. The Blade was created many thousands of years before the events of any of the games by the Ancient Vampire race. The Reaver was first forged by the Vampire Vorador some time around the end of the war between the Ancients and the Hylden, at the behest of Janos Audron. After its forging, the highest mages among the Ancients endowed the Reaver with their power
the Sword can hold the 9 Emblems of the pillars giving it power over those elements, the Emblems are as follows: Mind, Death, States, Time, Energy, Nature, Dimension, Conflict and ruled by the Balance Emblem. In-game players could only use Time, Dimension, conflict and energy however the others were deleted from the game due to gaming purposes 🙁
THE SOUL REAVER
The completed and most powerful version of the blade, the Reaver after gaining the soul of Raziel becomes its ultimate incarnation, not only having the power of its original blade but also the power of Raziel and gains soul devouring abilities, known attacks are soul blast which destroys the physical form of enemies as well as the power to blast most entities, demons, vampires and humans into steaming pieces with a touch the blade truly becomes kains weapon, in Defiance the blade is purified as is kain which argueably makes it more powerful than other soul reaver versions however this may be unlikely due to the storylines nature. (which has yet to be completed Crystal dynamics!! 😠 )
KAIN
Kain in his Younger form, this is in the Blood omen/Blood omen 2 era kain, before his evolution into the ancient vampire we see in Soul reaver games and Defiance, Kain in this era had super strength, his limit is unknown but he is shown to be able to lift fully armoured soldiers with ease, his other powers include stealth mist to become invisible, jumping great distances, berserker fury which was a extremely quick number of hits in a continious combo as well as incinerate which is capable of turning most beings to ashes, Magnus the vampire who first has this gift before kain takes his essence was capable of making stone explode as well. Kain also learnt how to control minds. In this form kain also defeats many Hylden, Demons and eventually when he gains the soul reaver once agian defeats the Hylden lord himself.
in Blood omen Kain had a similiar form but had extra powers that he does not have in Blood omen 2, powers such as transforming into bats and werewolves. Using his blood as weapons, Draining the blood of all enemies he can see making them dry, Soul death, possesing and taking souls at the same time as well as power over certain elements such as lightning, he also had limited energy manipulation to the extent that he could create bolts or balls of energy
KAIN
perhaps most recent kain look, after his thousand+ years of evolution, every few hundred or maybe less years he evolved gaining new gifts, kain after refusing the Sacrifice is supposed to of build his empire around the ruins of the pillars, by refusing the sacrifice, the land would slowly die. Kain built his throne upon the pillars and raised his 6 Vampire lieutenant's, Melchiah, Zephon, Rahab, Dumah, Turel and his most powerful Raziel, using his own soul to breathe life into their bodies. He ruled as a God the world of Nosgoth until events he read in the prophecy came true he followed the events he belived he had read.
in This form Kain is said to have all the powers of recent incarnations, in Defiance he showns mist, teleportion as well as batform, in Soul reaver he can use the dark energy similiar to the hylden lords and has the reaver, with which he uses soul blast.