Okay, let's go again.
Why was Stolas's Large Star Level rejected? Why was it completely ignored that the song perfectly matched what was happening?
I honestly do not understand, where did you get the idea that Stolas has clairvoyance? The fact that he saw Blitzo in the bubble can be regarded as a separate ability. There is not even a hint of clairvoyance.
I agree, it should only be cosmic awareness.
And for Large Star Level, here is everything that validates it:
1. Stolas is capable of appearing anywhere he wants inside, such as on the moon or outside the portal, despite being at least hundreds of thousands of miles away in the portals case.
2. The planets and moons acted and moved according to the feel and mood of his song, ending with the planets being absorbed by the dying star and the star exploding, as soon as he says "(as) Creation goes to
die" and yes, Creation here is capitalized.
3. He swipes a image of a unknown constellation and with his magic opens a rip to it. The process were portals open (drawing a pentagram and using the books magic) are invalidated when he creates the rip just using the imagery of a image and his own magic.
4. Stolas is a astrological based demon, as seen in his cosmic awareness, his song, and his magics effects. This means that he must have some way to study the mortal realms many cosmological effects, and test with them to (potentially) create his book. Thus, this realm could be his pocket dimension. For further proof, he was unfazed by the fact that he "portaled" to a dying star, and casually sang near it, all while he and his daughter were getting closer and closer to the star and its death.
5. You can't call these just artistic choice or inconsistencies, because 1. happens enough to were it is consistent, 2. because the planets and moons were literally moving very unnaturally, changing speed according to the song, and generally didn't obey the same rules you see seconds ago, all fitting with his songs pace and words. 3. because he ignores what is established in the pilot and episode of Helluva Boss, and he uses his own magic. 4. because if he wanted a backdrop, he could have chose far safer locations for his daughter, which would still fit with his song. But for some reason he swipes a image and opens a rip to it, and goes to a
dying star of all locations.
Hopefully this clears some things up.