On page 005900, why was Aradia surprised that Sollux could see the green sun? Were his "Mage of Doom" powers coming through one of his eyes? He is both blind and dead here, so which eye was it? The Green sun didn't exist yet, because it was created in Cascade... right? Am I missing something?

Sollux was blind in one eye, Aradia might have thought he was blind in both. As for the Green Sun, it’s right in front of them, this interaction takes place as Cascade is happening. Shortly after this conversation Dave and Rose will rise out of the sun.