Boss Bars

Boss Bars are bars that boss enemies will have, like Grave Boss, Heat, And Void King.

Normal Run Appearance
In a classic run on a gamemode, on the final wave the boss would appear and so would their bar as seen in the picture. The boss bar would show their health in a boss bar, and if you were looking closely at the picture, the boss has taken some damage already. After the boss is defeated, the bar would be completely empty.

Admin Run Appearance
So you were with an admin in game and want to know why their spawned Grave Boss still had a health bar? Simple! When a grave boss were to spawn, it adds a Boss Bar. This means there could be multi boss bars at once. They don't stack in the same spot however, they will make a tower formation.