Area Selection
The area selection tool can be used to create bounding boxes for things like ore veins.
Usage
The tool operates with filters, these can be edited with /catharsis dev area_selection add/remove <block>. Running that command will add/remove a block to the current filter list.
To see all currently allowed blocks you can run /catharsis dev area_selection list.
The area selection itself can be dispatched via /catharsis dev area_selection <range>, range being optional, defaulting to 100.