(this is just a list of what could be changed)
Milkyway Weaver replaced with Bone Serpent
Diabolist replaced with Red Devil
Skeleton Sniper replaced with Ichor Sticker
Gastropod replaced with Demon
Paladin replaced with Crimson Mimic
Necromancer replaced with Wither Beast
Deadly Sphere replaced with Ancient Vision
Granit Elemental replaced with Maggot Zombie
Granit Golem replaced with Meteor Head
Hoplite replaced with Lava Slime
Slimer replaced with Crimson Axe
Chaos Elemental replaced with Floaty Gross
Brain Suckler replaced with Wandering Eye Fish
Pirate Captain replaced with Drakin
Sand Elemental replaced with Hemogoblin Shark
Currently not accepting map-specific custom mobs. You’ll have to wait for: