Compare [Rune of Teleportation] which was used to teleport the mage alone to one of the major cities. * Stacks in lots of 20 each. (Before Patch 2.3.0, they stacked in lots of 10.) * Any class may purchase and hold these, however they can only be used by mages. * When the mage finishes casting the portal spell, one Rune of Portals is consumed, and the portal is opened. * To go through the portal, players in the caster's party or raid right click on the portal.