Badges update automatically and link to the mod page on MineUniverse.
This is an addon mod for both "Camps. Castles. Carriages." and Boss Checklist that integrates the former's Ser Marrow and Piglin Ranger bosses into the latter's boss checklist interface as entries.
"How did you make this work? "Camps. Castles. Carriages." is a data pack bundled as a mod!"
To begin with, the mod adds fake, unspawnable stand-in entities that act as the foundation for the boss checklists entries you see. The bosses' entries is automatically marked as defeated once the server detects that an instance of the corresponding boss has died.
"Why isn't this bundled with your other Boss Checklist addons?"
This mod uses aforementioned fake entities that are added by this mod itself. Thus, both boss entries added by the mod will appear regardless of whether or not you actually have the "Camps. Castles. Carriages." mod installed. You wouldn't want a modpack where players would go around curiously searching for a "Piglin Ranger" only to figure out later down the line that they do not even have the mod supposedly accommodating the boss installed in the first place.
