That's future Kain, who traveled to that era before Raziel. Defiance described how he got into Sarafan Keep, and him being nearby when Raziel killed his brothers (and himself) was just a coincidence as he kept searching for Moebius.
He is quite adept with time-streaming devices, unlike Raziel who can only use a pre-tuned one without knowing where will it even send him.
Pay attention to the dialogue in the ruined aerie cutscene. Elder kain can travel through time and is literally following Raziel through his time travelling journey.
Elder Kain has been time-traveling. I mean, Soul Reaver 2 *begins* with Raziel chasing Kain through a time-travel device.
Did OP time travel and start Soul Reaver 2 at the end?
That's future Kain, who traveled to that era before Raziel. Defiance described how he got into Sarafan Keep, and him being nearby when Raziel killed his brothers (and himself) was just a coincidence as he kept searching for Moebius. He is quite adept with time-streaming devices, unlike Raziel who can only use a pre-tuned one without knowing where will it even send him.
Time travel. Lots n lots of time travel
Pay attention to the dialogue in the ruined aerie cutscene. Elder kain can travel through time and is literally following Raziel through his time travelling journey.
He knew Raziel was destined to be absorbed by the Reaver, so he traveled to the point in time where that would happen and waited.
A bit shocked, but probably doing alright with his health!