I saw a couple of people ask where Drakis is located in Plane of Sky, so I thought I'd answer.
Drakis Bloodcaster is in the Quest Room in Plane of Sky. If you have all the maps, when you come on thunder princess isle, there are three port pads. One is to Azaracks, another to Nobles, and third is to Quest Room. The Key Master has the key to this.
You will find Drakis Bloodcaster there. Make sure you have everything with you (all the drops--silver disc, spiroc feathers and black silk cape for Necromancer Test of Power) before you go. That means you will have to jump off after looting all pieces, zone to East Freeport, get back to guild hall and port up again.
Good luck!