This is an addon mod for both "Desert Behemoths: Sandworms!" and Boss Checklist that integrates the former's Sandworm into the latter's boss checklist interface as an entry.
"Why isn't this bundled with your other Boss Checklist addons?" The Sandworm is a very bizarre entity in terms of mechanics and properties and exists in a way that the Boss Checklist mod can't exactly work with. This mod as a result uses a fake entity to represent the boss checklist entry that will check itself when the Sandworm has been successfully driven away. As a result of the fake entity added by this mod, the Sandworm's boss entry will appear regardless of whether or not you actually have the "Desert Behemoths: Sandworms!" mod installed. You wouldn't want a modpack where players would go around curiously searching for this Sandworm 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.
