Sans is so overrated. he mooches off Papyrus and Undyne in the fandom and wouldn’t be so popular if it weren’t for those two. And I don’t THINK he can really use gaster blasters. According to Asgore, his real power is to shoot bones, so it’s probably the ability to shoot bones. And don’t forget we’re talking about a little skeleton here. he lied about being related to Gaster so this whole gaster blaster nonsense could also be a bold-faced lie, especially considering this ability can only ever be canonically READ about and all evidence comes from Asgore, who thinks Toriel came from a family of ninjas, Frisk and Chara are humans and doesn’t know some things about certain characters. Also, everything about Sans’s powers come with ‘it is said’ or ‘theoratically’. Don’t just take things at face value people, I’m sick of seeing Sans near the top of powerful character lists for some unclear and possibly unreal ability.