How do I play a psionic pool of necromatic energy as a PC?

[Flashfire07]

Hey all. I'm statting up a lvl 7 character based on the below concepts. How the heck do I mechanicise all of this? My first thought was to simply play as a psion or wilder but I never did like the simple, restrictive solution so am curious as to what alternate options there are for this. Of key notes are the body swapping and the draining of necrotic energy when using his offensive abilities, I wanted to set up a HP drain for these but have no reference to go on for this.

Ejim is an unlucky individual who encountered a bizarre necromantic radiation which left him as a pool of liquified flesh, organs and bone which glows with an unnatural blue-green light.

The light is an extension of his mind and those who stand too close find his mind intruding into theirs. He cannot read minds but can pick up basic emotional states and powerful urges. Ejim could tell if someone wanted to hurt him for example but not that they’re going to attack now or that they poisoned his food.

It is also possible for him to use this light to lash out at his foes with a telepathic assault that overwhelms the mind with a jumble of thoughts, images, sensations and just general mental static. This drains him however so is rarely used.

Thirdly Ejim may use the necromantic radiation itself as a weapon. This takes the form of a field of blue-green energy that can be focused into a beam about as wide as the palm of a hand. Alternatively, it can be exuded as an aura or a wave. Those struck by the beam are melted down into a semi-living pool much like his natural form. The energy has a deleterious effect on his shell however so much like his telepathic assault it rarely sees much use.

Ejim requires corpses to use as a ‘shell’, the fresher the better. Over time these rot from the inside out and he has to swap out his body every few weeks if wishes to avoid having parts of his shell failing or falling off. The external flesh is the last part to rot and thus he can usually blend in with the human population long enough to secure a new shell. Sometimes Ejim retains memories of the body he inhabits and over time he has collected many fragments of other people's lives.

If his shell is destroyed Ejim has to find a new one before the necromantic energy bleeds out into the world around him and he loses more and more of himself before finally dying as a smear of gristle and dried gore in roughly one week.

His current shell belonged to a man by the name of Waltheof Biorsson. A warrior for one of the local power groups he was slain by the grasping fingers of an Abyssal Hand. The crushed throat proved an impediment to speech but through careful manipulation of the dead muscles he can croak out conversation at surprising volume.

[Heliomance]

Something involving Psion Uncarnate and possibly Necrocarnate might be worth looking into?

[Septimus]

One level of oozemorph then following in Dark Elementalist kineticist? Not sure that would be efficient, but the mechanics work most of your description.

[Feantar]

Edit: What Septimus Suggested is actually much closer.

Let's break down what you're asking from a stats perspective:

Pros

• Amorphous
• Emotion Sense and Minor Manipulation
• Telepathic Attack that causes Mental Distress
• Basic Attack that can take the shape of a ray, a spread or an emanation, and that causes those struck to become amorphous themselves.

Cons

• His attacks have a physical cost on himself.
• Needs to inhabit a corpse to survive, which rots at an accelerated rate. He dies outside of one within 7 days.

Now, I am not sure you can hit this exact build by raw... some of the characteristics are essentially at will powers, some others remind me of the Suel Lich template (Dragon Magazine) and the Brain in a Jar undead from libris mortis. The visual reminds me of Nishruu from Forgotten Realms.

Let's see ways to replicate some of your abilities:

1. Amorphous: Since you actually describe organs, then you're not immune to critical hits and you (probably) have eyes (since they are organs too) so... this could just be a flavour thing? Penalty to Diplomacy (AAAAAh tis a puddle of organs!) and bonus to intimidate (AAAAh tis a puddle of organs that talks!).
2. Emotion Sense and Minor Manipulation: A somewhat satisfactory simulation of these would be Detect Hostile Intent and Telempathic Projection. Both level 2 powers.
3. Telepathic Attack: Either Mind Thrust(for actual Damage) or Disable(for a more dissorienting effect). I could add daze here, but that is a really bad power and it should be ashament of itself.
4. Basic Attack(Ray/Spread/Emmanation), Amorphous Transformation: This is difficult - if you picture the attack as damaging other and, when damaged enough, they become amorphous, then just get a couple of warlock levels, choose the right shapes and take Merciful Spell from pathfinder and flavour it accordingly. If, on the other hand, you want it to essentially be a save or suck, the closest I can think of what you want is Fuse Flesh, which is a touch power. How do you picture this power functioning?
5. His attacks have a physical cost on himself: I'd make this as follows: When outside of a corpse you cast from HP - all your powers have the same HP cost that they would have in Power Points (or Spell Points). When inside a corpse (if you still want this as an issue) just follow the Vitalising Variant, but with HP. Not actual damage, just fatigue and exhaustion.
6. Needs to inhabit a corpse to survive, which rots at an accelerated rate. He dies outside of one within 7 days: You cannot regain HP when out of a corpse and you loose 1/7th of your HP each day. Maybe change this to, you lose 1/levelth of your HP each day, so each level you gain gives you an extra day.

[Falontani]

From Libris Mortis 3.5
Brain in a jar
Psionic Undead
Fun to play

[Andor13]

This is essentially a monster as PC concept. Sure he started out as human, but lots of monsters start out as humans.

I would work with your GM to design this as a monster, with 7th level as the starting point you have a fair amount of HD and LA to work with. Spend, say, 3 or 4 of it on the base abilities, and then pick a class and start advancing. You might get good mileage out of the Crimson Countess archetype for Harbinger, it needs only very light refluffing to be a good match for many elements of your idea. If you swap out a discipline for Sleeping Goddess, you can even get into the mind reading aspects, assuming you didn't already cover that with monster levels.