So the most notable things away from his cannon design are how i draw his horns and face. I draw these both similarly to how I draw Smuldunde and Dedusmuln because I hc that Fleam is also a splithead. His more person-like face is a mask that he wears over his face to look less scary (that Instar encourages him not to).

Since he's a splithead I draw his horns bigger like i do Smul's and Dedus' (unless they're still growing back from them dying, then they're skinnier). The main difference to them I draw him with are the holes surround by green. This is from an infection he has in them. Basically the outer layers of a splithead's horns are made of slime mold that's highly sensitive but has a outer layer that's more solid and skin like. Fleam has an infection in his caused by another splithead's slimemold getting in there. The other slime mold attempts to eat Fleam's causing large gross holes to appear all over his horns.

He managed to get the infection in a duel he had with Dedusmuln. After the events of the first game Dedusmuln went back to his home village of splitheads to see how people were holding up after the spell of madness and Fleam was like "no way you were one of the people who took down Gibby you loser" and challenged them to a duel. In splithead culture duels are supposed to be to the death (since you respawn anyways), but once Fleam was starting to lose he got scared and started to run because he remembered how Gibby didn't respawn after Dedusmuln fought him and his ass didn't want to be next. This is suppperrr disgraceful to do, plus made it easier for Dedusmuln to kill his ass and steal his armor (which is where I hc they got their armor in the second game from).

Anways a bit after his horns had regrown from his trip to the afterlife the holes started appearing and since the illness is super uncommon the village was like "ew what the hell" and chased Fleam out throwing rocks at him </3 bc they thought it might be contagious (which it's not!) But Fleam doesn't quite know what it is either so he assumes the sages cursed him for being dishonorable in battle.

Another part of Splithead anatomy my friend who came up with the anatomy hcs ( @eggratgremlin ) came up with is that their eyes are located within the slime mold of the horns, so due to the decay of Fleam's, he is mostly blind. They're also where they smell from so his sense of smell is dulled too.

Okay so split heads are like Humanoid beings that are clay based and are symbiotically  tied to fungi slime molds! I personally refer to them as mulns (because dedus and smul both have ‘mul’ in their names)

huge ass lore drop under the cut