A Skrewell derivative - original instrument by LaZy fiSh
Its automated by some Rachmeil macros
Then the second gen is Myserio feeding through Neptune both by Brett.
There is also an echo and reverb both by Brett aswell.
In the chain there is a feedback stage.
Also a comb filter with various fm sources.
Version II just adds in a Fu-Xi drive which gives it a second feedback stage.