Aaaand we're back to Sans and his mid-battle contemplations. This is one of those pages where there's a lot of exposition and recapping to be done, lest I spend a ludicrous amount of time drawing every single fight, and I'm doing my best to make it feel natural instead of being a bland infodump.
If you're curious about the platform of harmless magic in Sans' attack... I actually am, too.
In his in-game battle, there are turns where the floor is coated in damaging bone attacks, but there are platforms you can jump between to avoid certain death, and I'm not sure what in-story explanation there is for why Sans would include or allow those platforms in his attacks.
1. The human's soul power interfering with his magic somehow - a theory supported by the fact that he CAN do an undodgeable and lethal attack if and only if you let down your guard.
2. His blue magic, which causes gravity to affect the soul, somehow disrupting the ambient gravity in a way that caused debris on the battlefield to float around. Given the lack of clutter in the Last Corridor, that seems less likely, unless his attacks were chipping pieces off the pillars.
3. His reluctance to fight. Sans won't engage you in battle unless you leave him no other sane option, and monsters' bodies and attacks are attuned to their souls, so it could be that Sans is simply so inherently nonviolent that even when he's trying to use his full power, there are fragments of hesitation or reluctance in his magic, manifesting as platforms that can protect his opponent.
Personally, I suspect it's a combination of 1 and 3, but it's totally up to players' individual interpretation.
On a lighter note, if you complete the game after befriending several key monsters, but without completing all the requirements for the best ending, you get a phone call from all your friends. During that call, Papyrus asks Undyne not to noogie the phone or the skeleton.
Given how much she openly enjoys driving him crazy, I could see her stopping in the middle of a training session to give him a noogie.
One thing Sans, Undyne and Flowey can all agree on: messing with goofy, melodramatic and persnickety skeletons is fun.
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