He's a parasitic god who grows in power as the other big 4 do so themselves. He seems to have a certain preference to using individual agents for his goals, but isn't above warbands. He enjoys the destruction of entities and followers of other chaos gods.

Followers of Malal are often those wronged by a greater power, be it a servant to a great nobleman or a follower of chaos forsaken by their god. As he has far fewer followers than that of the other gods, followers of Malal seem to be given greater gifts and powers from him so that they might accomplish his/their goals with greater effectiveness.

If I had to put emotions to his name, vengeance seems to be a notable one. Rage, hope, pleasure, and despair can all be driven from revenge, thus the parasitic nature.

He is often associated with the self-destructive aspect of chaos, and many interpret this as such on an individual scale, such as the emo stereotype, which I consider inaccurate. A god who has far fewer followers than his peers that tends to have individual agents work under him would not simply throw them away as easily; he would be more conservative when possible. This self-destructive aspect is reflected in his/his followers actions, which often involve the destruction of followers and daemons of other gods.

His number is 11 and his emblem is a bisected half-white-half-black skull.

Yes, I am quite aware that the Sons of Malice indeed worship a a being they call Malice. While the Sons do indeed call him a god, it seems more like they summon a greater daemon based on the sacrifice of great warriors. I've read Labyrinth a few times, and there's even a link to it in one of the archived threads for those who would like to read it.

But let's face it. For one, we're dealing with old or otherwise retconned lore here, and there's huge gaps that can only be filled with interpretation. Secondly, while I'm still trying to gather reputable evidence on the matter, Malice seems to have been created after Malal was retconned out of WHFB's lore, as GW's way of appeasing the few fans or whatever. One can only assume, but it would be rather likely that "Malice" would have still been "Malal" in 40k had that issue of rights not have existed.

Anyway, in regards to interpretations and my own project, I kinda feel that the Sons were indeed worshiping a great daemon. To not conflict with what little cannon there is, my warband might be a splinter of the Sons who also thought this, and went on to find the true Renegade God themselves. It covers having a fewer amount of marines in my force, as I did plan to use a good amount of generic-daemons.

I have a pretty solid Lesser blueprint currently, though it's obviously missing the head. I've yet to have a chance to compare a kroot hound model to a genestealer body so I still don't know if those k'hound heads are a usable size.

It's based on what is assumed to be official art of Malal's lesser daemon, though I've yet to find an exact source for it yet. It seems to be widely accepted as official, and I like the design enough anyway.

Ah, my Greater Daemon, one of the centerpieces for the army.

I went ahead and got a soulgrinder kit mainly for the upper body. I've already made Oyumaru molds of it, and when I'm ready I'll cast the front half and pull it out early so I can easily bisect it and shape it to my needs. The rest of the kit will be useful for pimping the model later, to make it look more Chaos than Tomb Kings.

The arms I'm still iffy about and I'm not sure what to do with them. Ideas welcomed, as always.

Another centerpiece, and is in a state of development hell right now, design-wise.(no pun intended)

For the head, I've got the Defiler's skull mask that I plan on using, and for the horns I'll be making a rack very similar to Be'lakor's there. Fairly simple concept but it'll look good, I hope.

For the chest I've copied the CSM breastplate already. I want to make it different from the standard design, but all I know is don't-wants instead of wants. Things I know I don't care for are the circular vent, the rib-stripes, and basically the way they did the arrow-trim around the collar. I've drawn some more ideas for the breastplate in my spare time, but I'm honestly not sure about which way to go about it.

The arms are going to be based on the CSM-styled arms, but are going to be molded so that they are free of daemonic faces on them.(a blank slate for me to work with) I'm going to remove the stupid elongated middlefinger feature because I just find it tacky. No design-idea for what should be on the armor otherwise here.

I've finished making a blank version of the pauldron with just the trim. Not sure what to do for the actual design of it though. Well, that's a half-truth. I know I'd like to use different arms to represent different psychic powers, including different styled pauldrons. Recycling an idea I originally made for Scripty to use on his Mortarion, one pauldron will be an orb embedded in it. (I will not be modeling warptime or Gift, as I would never use them on their own anyway.)

As the default axe didn't interest me, so I've been working on a design that's less weedy. A kind Anon threw an idea at me that I rather liked, and I've worked with that so far to get what we see now. (NO Dreadaxe for the prince, as that's going to the Chaos Lord down the road.)

For the legs I've figured out how to armor them. I've made copies of the rear-leg armor from the necrosphinx kit(as it's just the right size) and removed the carving and designs from them so far. I just need to reshape them a bit more so they fit together, then I'll use them as blanks to clone and build upon.

Wings will be on magnets, nothing hard about that.

Not sure if I want to give the prince the tail. While it would fit with the dragonish theme, it seems a bit dull in design. Maybe a more customized tail could work, but of course I have no idea for design.

Psychic Powers ideas:
Doombolt: Likely some sort of daemonic gun mounted on the arm. I've some razorback heavybolters that might be a good base.
Wind of Chaos: Unsure on this, to be honest. While I could easily go the flamethrower route, it seems a bit of a cop-out.
Lash of Submission: I'm thinking something involving chains, a bit inspired by Spawn. Wrapped along the arm and extending from it.
Bolt of Change: Likely what I'll use the orb pauldron for. Maybe carve runes into the gauntlet.
Warptime and Gift of Chaos are two that I for-sure have no intention of using. Not sure about Nurgle's Rot either as it seems a bit weedy.