Zehtuka's Pack

Zehtuka's Pack is a mysterious item that can be found in the Poisoned Outcrops,The Sulfurous Wastes, The Shattered Ravines, The Ruptured Heart or Joko's Domain

It behaves exactly like a bag that's been upgraded with a Rune of Holding. It can be equipped in the inventory! The pack cannot be dyed.

Most likely it belongs to The Great Zehtuka.

Map

 * A sighting of Zehtuka's Pack
 * In the Ruptured Heart, it spawns next to Shahin. See adjacent image.