Wolves by mac-so
Could you give some hard and fast rules limiting magic? As it's written, you basically have an option that you can use to write yourself out of anything (looking at Sans here). Right now Chara's plan could be implemented and we wouldn't have any fear because someone can just "magic" up a solution that was previously unknown. You need to be careful when dealing with this stuff because it can lead to lazy writing when done wrong (like a bunch of time travel stories).