The protoleather torn bag is an object dropped by monsters in Daemonheim. It may be used to make the Cub worldbearer pouch in the Summoning skill. This is a Dungeoneering familiar. The pouch can be made at level 7 Summoning and requires an empty pouch and a gold charm. It is otherwise dropped by most monsters in the dungeon. The pouch is of almost no value to free players, as they cannot use it in any way, but it may be sold to the Smuggler for 93 coins. Note that it is "Useful to summoners, and valuable to smugglers", which is simply a hint to sell it. However it would be better to sell a higher tier pouch as they are dropped about as commonly as the others.