Vincent: Ok...so...it's not that one either...
He starts flipping through the book, looking for answers.
Vincent: ...WAIT! This-this could be it...Contritione Pervalida...it's a disease only shardkeepers can get...
(Imma add to the shardkeeper lore real quick-)
Vincent: Ok...it says here that when a shardkeeper finds the person that they want to spend the rest of their life with, a new shard forms in their blood, eventually convalescing in their wrist...however, should the object of their affection reject them, the shard will break down in their bodies, causing choking, clotting, and eventually...death...