Hey sorry guys but Ive been going over Cascade a lot an there are still so many questions I have, hope that's okay. Firstly was the green sun the source of energy for guardians of both kids and trolls universe? But since the tumour was there because the session was failed why did the green sun come out of the tumour? Doesnt it have to be in ever session? Why did its becoming kill Doc Scratch and did it kill becsprite too? Also since sn0wman died was the destruction of both universes necessary?

Yes the Green Sun is the source of the first guardian’s powers in both universes.

The tumour paradoxically destroyed and created the Green Sun.

The Green Sun didn’t kill Doc Scratch, the collapse of the trolls’ universe did.