I mentioned a while back that I was planning a project to give this game a set of solid rules for possession.
As it turns out, that requires revising Demonic Co-Pilot and Domination.
So here goes.
The issues with Demonic Co-Pilot are well-known.
I plan to fix them by having the demon make only one attack per scene, with a strength that depends on the number of times you called upon it for a +1 bonus. If you get taken out, it inflicts a debt compel or messes with your Aspects.
Domination isn't all that badly written, but it could use some more definition. How long does it take to dominate someone? What does dominating someone do? And what, if anything, stops a character with Mediocre Discipline from wearing down one with Epic Discipline over time?
This rewrite is supposed to make all that clear. Also I'm planning to make Master Dominator better and more versatile, because it's pretty lame as is.
Possession doesn't really have any rules, as it stands. The main point of this project is to change that.
This is quite a big job, because there are like five different types of possession to cover. Each needs its own Power.
First, there's possessing scenery in order to affect physical things. The Power for this will closely resemble KOFFEYKID'S Possess Corpse Power.
Second, there's possessing willing allies and giving them a boost, Shaman King style. The Power for this will resemble the Mind Meld Power that's on the master list.
Third, there's possessing willing allies and using their body as your own. Harry does this a couple of times. The Power for this will be similar to the upgrade for my Spirit Form rewrite.
Fourth, there's possessing unwilling targets and becoming a corrupting influence in the back of their minds. The Power for this will involve winning a mental conflict in order to become an Aspect on the target. Once you're an Aspect, you can make a mental attack each scene to corrupt them as they make a mental attack to eject you. With an upgrade, you can do the Demonic Co-Pilot thing.
Fifth, there's possessing unwilling targets and taking over. Have a mental conflict, if you win you get an effect similar to the third type of possession. The target can attempt to free itself every once in a while, and whenever you use its body to do something diametrically opposed to its nature.
I'm still not totally sure how to treat animals. Are they scenery or characters?
Other than that, I think the plan's pretty good. If it's somehow flawed or incomplete, this is a good time to point that out.
Watch this thread, the Powers will be going up as I finish them. All seven of them.