A portal is a quick, very quick, way to get from where you are to one of the capital cities or Shat/Dalaran. Only mages can make portals and they require a Rune of Portals to use. Druids can use the...
To be able to shoot the blue portal gun, you must aquire it. To do so, goto testchamber 2 and, you will find the portal gun. Simply reach it, by steping through the portal it shoots, and then grab...