Another suggestion

[TetroYT]

Be able to set flags for where the boss spawns

Example: you could create an area let’s say with /boss pos1 :boss pos2 /boss areacreate (name) then within this area you can change attribute like no fall damage, no potions, no dropping items, not breaking/placing blocks, player damage (so you can/can’t deal damage to other players trying to kill to boss) would be very useful and would take this plugin to the next level