Come see the GW2 Necro in action. The necromancer is a powerful casters in both PvP and PvE and can really dominate in Guild Wars 2 when played correctly because of his shadowform mechanic which effectively gives him two different lifebars. Add to that his powerful pets and the Necromancer is a force to be reckoned with. You can find overviews, PvP, WvW, and PvE videos for all the other classes in Guild Wars 2 by clicking on this link.