I have come to inquire on your worldbuilding ideas :3
okay, so- the whole tree/corruption dynamic type thing is something that i've been thinking a lot about recently
and not just bc i got flashbanged w/ the rough fic outline of a lone Treespawn P1 and Corruption spawn (Graftspawn?) lltnf getting it on surreal style bc they're the only ones who can really understand each other as both children of something 'other'
this is more of a basic overview tbh (i'll need to find my google doc)
Corruption is a semi-eldritch sapient disease w/ prion disease (specifically chronic wasting disease) and rabies vibes that originates from shapes. (specifically, it generates from a overabundance of energy, think how you can only put so much air into a balloon/so much water in a bottle until it pope/overflows) mindset is all about survival, since it is very much mortal, and its survival depends on how many hosts it has. no more hosts? it's dead.
Treeangle however, is sorta fungus-like as in the actual treeangle isn't so much the force behind it, as much as the 'fruit' of the 'mycelium' and is therefore completely OTHER. you can't kill or even HURT it in any way that matters, distant, really only interacts with those it takes interest in, or first generation treespawn which it 'sculpts' itself. in the eyes of the tree corruption is just a disease and therefore, it cleanses it.
I like the idea of the influence of both being able to be 'seen' in a mindscape sense, with the 'tree' being seen as a jagged tangle of roots, and corruption appearing mostly as a chaotic, yet fluidly shifting mass of flesh, bone, and veins, albeit one that roughly takes on the appearance of its original host. (I actually made some art of a example of this in regards to my canon-adjacent au-)
Corruption is more... personal, hands on, it goes 'if you want it done right you gotta do it yourself' and just DOES it with no hesitation. Corruption may not have the same sort of set of feelings that shapes do, but that doesn't mean that it can't grow fond of a host, or even fall in the closest thing to love it has. I mean, that is how Corruption Spawn (not to be confused with Corruption Born) come to be-
The Tree just sits there and occasionally talks to those its invested in, even if it's incomprehensible to those it didn't make, it doesn't have any real kind of emotions other than interest/neutrality/disinterest at all, but still is interested in shapes, which is why Treespawn are made to begin with. other than that? you can't really understand it.