Queen Slime Ariel Daileas the 6th birthed him and told him to become a king like her husband but less slimy so he became an annoying b*st*rd after she died because everybody made fun of him at school so he tracked down the people who made fun of him and killed them in a gory displace. And still killing nice people who started to make fun of him, collecting human/monster agony to become stronger! (Jayceon will be back with more terraria lore)
