I don't know if the cinematic was to be taken literally.
But if he's able to hold a literal star in the palm of his hand that he created at whim and then crush it like it's nothing...
Just how big is this guy in the lore?
Well he does look like he materializes. So he might scale down.
As I like to say, "Big enough".
But if he's able to hold a literal star in the palm of his hand
You know what they say about a guy with big fingers.
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He has a lot of trouble finding gloves in his size.
Chogath rektsai malfiteme
I could imagine him being limited in his interaction with runeterra somehow. I mean the other celestial powers(pantheon,the sun and the moon) all seem to need a mortal vessel in order to enter runeterra,so it is possible that sol has to limit his form in order to interact with it properly.
I recall a Rioter saying that he will be more of a small Dragon. Dont expect Mundo / Cho Sizes.
