[Ranylyn]

I did have possession at Rank 5. Could it be like trap disarming where it's not actually 100% at max rank?

EDIT: To Clarify, it wasn't 10 misses in a row at rank 5, but I did still miss at rank 5. I was so determined to get that spirit since I wanted to see if Animated Swords had Companion Weapon if generated by a player (they do not) that I actually used a respec fruit to set it to rank 5:

You use the Fruit of Talentlessness.
Your talent points have been reset. You may now redistribute them however you like.
The spirit resists your exorcism!
The spirit has been eased into possessing you... (Spirit effects: +3% Damage to Shark)
You use the Ritual of Sword Binding.
You have created an Animated Sword. Hope it can keep its hands to itself...