Finally, a design for papyrus! Story stuff ig: So during the human raid or whatever, sans got snuck up on and couldn't move fast enough to dodge a blow to his skull, completely breaking a side of it, causing him to have memory problems that leads to forgetting stuff One day, he eventually forgot papyrus and tried to kill him for thinking he's a stranger, which lead to the crack on his skull. Now years later. The core broke down, snowdin is a blizzard. Waterfall is going through a drought, hotlands is falling apart. Papyrus has basically been broken due to the conditions of the underground, where he finds out that not all monsters can be sparred and is forced to kill at times, to help make it painless for them. He uses an enchanted machete (enchanted to make it a lot sharper and durable than it looks) and learns how to move much much faster for silent quick kills and if sans ever arrives. For the design, papyrus has cracked armor under his outfit for if any tough monsters show up, as he might be faster then then, but definitely aint stronger barehanded
Btw those lines next to his eyes are NOT cracks, they are just smile lines or whatever (P.S: if y'all want, I'll make expressions)