Cobalt skillchompas can be caught using box traps at the Tree Gnome Stronghold Hunter area. This area can be accessed by travelling south-west from Barbarian Outpost or via shortcut north of the Grand Tree within the Tree Gnome Stronghold (requiring level 19 Agility. Once trapped, cobalt skillchompas become stackable items, so players may hunt them for long periods of time without needing to bank.