Board Thread:Dark Souls II/@comment-46.64.182.203-20140312230146/@comment-24756074-20140417222619

Souls manipulating the posseser (not the owner) is already apparent in the Ornstein and Smough fight. Which ever you kill first has his soul absorbed by the other changing how they attack/look. So the idea of someone happening upon the Spear and being influenced over many years is by far (to me) the most sensical approach.