The Haunter of the Ring

I’ve been working on an adventure but it is taking longer then I thought. I’m mostly done the statblocks & body of the adventure but still need to write up the finale and locations for when the players inevitable break into places. However it has been a month since my last update and well, that one was pretty light to say the least. So here is a preview: The Haunter of the Ring is the main threat in the finale, so I’d like some feedback on him. He is stated out from the Call of Cthulhu, which is about 90% compatible with BRP. If you are familiar with either of those systems let me know. The description is intentionally vague since I figure players imaginations are stronger then my writing, though if you have any suggestions I’d love to hear them.

The Haunter of the Ring:
Str 25, Con 25, Siz 15, Int 36, Pow 36, Dex 35
Move: 7 flying

HP: 21
Damage Bonus: +1d6
Weapons: Claw: 55%, damage 2d4+1d6
Armour: 3 points of supernaturally tough hide
Spells: The Haunter knows a number of spells, all frightful in nature but will not use them in combat for Roelocke does not know about them and thus has not ordered it to use them. If the investigators summon the creature from the ring encourage it to trade them the most horrific spells the keeper has access to in exchange for horrific payments, preferably the character’s souls.
Skills: Bargain 60%, Mislead 75%, Spot Hidden 60%, Listen 50%, Entice Mortal 80%, Parry 60%
Sanity Loss: 1d4/1d8

Possession: The most dangerous power of the Haunter of the Ring is it’s ability to control others. For the cost of 5 Magic Points it can attempt takes them over with a Power vs Power test. Double this cost for truly innocent characters who also gain +10 to their power for the purposes of resisting. The length of time the character is possessed is also determined by their innocences. A truly innocent character may only be possessed for one action at a time. A normal man or women can be possessed for 10 minutes at a time, and someone risking a stay in hell already can be possessed for up to an hour. Truly depraved people can be possessed for an day at a time. The Haunter can spend an amount of Magic Points equal to 5+(The number of periods it has possessed the character for already) to continue to posses it. When possessing a character they must be in physical contact with the haunter or the ring. While possessing a character it cannot be physically harmed, though it does not heal or regain magic points. It can however still be targeted by magic attacks and is subject to bindings and exorcisms, even those not actually magical in nature.

Description: A demon as old as the world, the Haunter of the Ring is said to have been bound by Solomon himself. Those with more occult knowledge realize that Solomon’s reign is far to recent for that. When it takes physical form the Haunter appears as a shadow with eyes the colour of molten steel and dagger-length claws that glow as if they had just been pulled from the forge.