From WoWWiki

The Vector Coil is a portion of the Exodar that crashed into western Bloodmyst Isle. The area is a source of power of the blood elf invaders in the Azuremyst Isle, and is fortified by saboteurs and agents of the Sunhawks - the minions of the Sun King, Kael'thas Sunstrider. An eredar named Sironas is the leader of the Sunhawks in Bloodmyst, and is harvesting power from the Vector Coil itself.

The sun gate is located to the south of the Vector Coil, and guarded by Sunhawk defenders and pyromancers.

This article or section includes speculation, observations or opinions possibly supported by lore or by Blizzard officials. It should not be taken as representing official lore!

The name suggests that it is not only the power core for the Exodar, but also possibly a kind of transmitter, engine component or a map of some sort. (A vector is a line, used to specify location or velocity)

Subzones of Bloodmyst Isle

Amberweb Pass • Axxarien • Beryl Coast • Blacksilt Shore • Bladewood • Blood Watch • Bloodcurse Isle • The Bloodcursed Reef • The Bloodwash • Bristlelimb Enclave • The Crimson Reach • The Cryo-Core • The Foul Pool • The Hidden Reef • Kessel's Crossing • The Lost Fold • Middenvale • Mystwood • Nazzivian • Ragefeather Ridge • Ruins of Loreth'Aran • Talon Stand • Tel'athion's Camp • The Veiled Sea • The Vector Coil • Veridian Point • Vindicator's Rest • The Warp Piston • Wrathscale Lair • Wyrmscar Island