Hi, I don't know if this is the place to post this, but I have a question about one of the custom powers.
SPIRIT FORM [-3]
Description: You are an incorporeal spirit form, able to pass through walls and other barriers in the mortal world. Thresholds still have an almost physical reality to you, however.
Skills Affected: Many, especially Conviction.
Note: This power may not normally be attached to Human Form, Feeding Dependency, an Item Of Power, Magical Self-Enhancement, or any other power that can "turn off" the powers it is attached to.. The Astral Projection and Manifestation upgrades, if taken, entirely remove this restriction except with regards to Human Form.
Effects:
Insubstantial. You are invisible, inaudible, and incorporeal. This means that you can neither affect nor be affected by physical things, except as dictated under Vulnerabilities and Manifestation. Any magic that you cast is also incorporeal, and useless against anything physical. However, you can perceive the physical world normally, and under some circumstances it may be possible for physical characters to perceive and communicate with you. Characters with this power may affect each other freely.
Shaped By Belief. Your very existence is defined by belief. As a result, you are not closely bound by physical reality. You may make Maneuvers and Declarations with Conviction to define your physical form and the nature of your interactions with the world.
Vulnerabilities. Certain physical things can harm you despite your intangibility. These things include ghost dust, fire, and sunlight. What's more, you cannot cross thresholds at all.
Manifestation [-2]. Once per scene, you may force yourself to manifest physically. This negates this power until the scene ends, you choose to become immaterial, or you get taken out in a physical conflict. Using this trapping is an insane act for a ghost, and as such this trapping may not be possessed by sane ghosts. (Other forms of spirit might not have this limitation.)
Poltergeist [-1]. You can exert a tiny amount of force on the material world. Normally this does nothing of importance, but when machinery is around you can often interfere with it. You may use Conviction to make maneuvers disrupting physical machinery.
Spiritual Physics Abuse [-1]. The laws of physics only affect you if you think they should. Teleportation is possible for you. You may substitute your Conviction skill for your Might skill when exerting force, your Athletics skill when moving, or for any other physical skill as the GM feels is appropriate.
Mind = Matter [-0]. Your body and your mind are the same thing. You have one stress track that is used for both mental and physical stress. Its length is determined by your Conviction skill. Toughness powers apply to this track, but mental stress automatically satisfies catches. Consequences taken on this track do not recover naturally unless you provide some form of special justification, generally involving the absorption of memories. More severe consequences require more elaborate justifications.
Astral Projection [-1]. You are a physical creature, but you can leave your body when you feel inclined. You normally do not have access to this power, but you may gain access to it any time by taking a supplemental action. When you do so, your physical body is unconscious and immobile. You may return to your physical body at any time by physically entering it with a supplemental action.
Involuntary Projection/Manifestation [+1]. (Requires Astral Projection or Manifestation) You have no control over whether or not you are corporeal at any given time. Choose a condition in collaboration with the GM. This condition determines whether or not this power is active at any given time.
Possession [-1]. You may enter the bodies of others, combining your power with theirs. Given a willing host, you may enter that host's body as a supplemental action. This allows you to control their body, using your own skills for all rolls. While you possess a host, you have access to all of your own powers and those of your host's powers that your GM deems appropriate. The host's skills may modify yours, at the GM's discretion. Physical stress is inflicted on the host, not on you, and the host's physical stress track is not affected. If you cast spells while in another characters body, you must pay for those spells with your own mental stress. However, your host suffers backlash for you. A character who is being possessed may not act, but they may force the possessor out of their body at any time.
I think this is a great power rewrite, and makes tons of sense when applied to a ghost themed character. As far as I know, the original Spirit Form power (for the same -3 cost) allowed you to move objects with conviction, talk to/interact with people (or be invisible, depending on how manifested you were), and gave a bonus to social skills depending on your form. It also almost certainly allowed you to cast spells that worked in the physical world. On the other hand it did not give you any immunity to physical effects. With this version, in order to get a similar effect I have to spend 5 refresh and still don't get the social skill bonus (which was kinda lame anyway). This cost makes sense since you also have the option of being physically immune.
My question is how you would apply this rewrite (which upgrades etc.) to a Bob like spirit with variable levels of manifestation. Clearly Bob can cast spells in the mortal world (at least Evil Bob can, I don't remember if normal Bob ever does), he also goes through walls/is invisible, or talks to people. It seems that he either has this power with an upgraded Manifestation that allows you to change state at will (expensive version), or he has this power but without the "Physical Immunity" clause of Insubstantial and and then is always in some level of manifestation, sort of part way between corporeal and not, and is thus effected by attacks, but still not effected by walls, and is maybe invisible when he is mostly incorporeal and thus cannot perceive/effect people in the mortal world (this would be the cheaper option, similar to Spirit Form from RAW).