You have just entered the Shadow Shard, a series of islands broken down into four main sections. This is, in association with Portal Corps, a miliary-controlled and supervised restricted access location. If you don't have one already, see a vendor about a Flight Pack. Oh, and make some friends because this place is deadly.
See my report for more information. It should give you an idea what to expect: RECONNAISSANCE REPORT *** Approved Use Only *** History: The Portal Corps has provided access to this dimension in an attempt to keep Rularuu from swallowing up another world. He's weaker on his home turf. Hostiles Strength: Levels 40 through 47 Suggested Squad Parameters: 5 to 8-person teams Highlights: