Rune of Holding

A Rune of Holding is a rune that can only be applied to bags. It is used to increase the storage capacity of a bag from 5 slots to 10 slots. Other inventory supplements like Belt Pouches cannot use this rune. Bags that already have 10 slots also cannot use this rune (such as an already upgraded Bag, Zehtuka's Pack or a Charr Bag)

It can be bought from many merchants for 500 or from faction merchants for 400. In Prophecies, the earliest locations where a Rune of Holding can be obtained is from Ascalon City, after the Searing. In Factions, these are available starting from Seitung Harbor. In Nightfall, the earliest is in Sunspear Sanctuary. All Eye of the North merchants sell this rune.

A Rune of Holding can also be obtained from quest reward trophy collectors for 3 reward trophies.

Trivia

 * Would the suffix be applied to the bag, it would become a "Bag of Holding" an iconic item in the Dungeons and Dragons table top RPG.