1.You Could Add Sinners and Big Big Big Hollows Like Super Bosses.
2.There could be like There could be an Underwater Palace with Water Monsters and At the bottom a Huge Water Boss.
3.You could add fullbringers and like it'd be a quest for Humans,But not for all humans.
4.There could be Mountains where Like lvl 300-400 travel,with rock type Hollows/monsters.
5.There could be Like Mounts,Hollows get hollow mounts,Soul reapers get like Lizard,owl,Monsters,stuff like that.
6.Maybe A Cloud Place where you travel up and up with monsters for 100-300.
