[quote=@The One]
[@Blackmist16] Interesting Cs. How exactly does he 'Summon' the stars? Since stars are luminious balls of gas. Our sun is a star, just a dwarf star. 
[/quote]

Aster can create star-like matter meaning the stuff that stars are composed of (i.e gas) but scaled down, so he can create small amounts of stars out of this.