This makes no sense to me, thor had sworn his eternal allegiance to our main character, and oaths are usually not something that should be broken in these magic world.
@mojo
It's less that, its more her luck which is why I found the friend suspicious, he gets a lot of stock from her and quickly rose in the mercurial field, it just seemed that she's the only reason for his success.
When taking in colchis the blood is fine, the flesh can be taken in in very small amounts less you mutate and lose your sense of self or memories, and the heart mist not be eaten for that will instantly kill you unless you have been prepared for it in which case even then it can fail, unless you...