Ghosts in the Box are Mana Potions for Necros!
Derek Ravenclaw
It's true. When the Ghosts from Ghosts in the Box die, soul reaping is triggered; this means that PVEer or PVPers can bring them on missions and when they're low on energy, just fire off a couple ghosts. Charr carvings usually cost about 50 gold each, and you only need 3, so it's a mana potion equal to your soul reaping for only 150 gold, and you can bring as many as you want. Try it out if you don't believe me, but I think I'm going to make a N/E for PVP with fire skills and soul reaping to recharge myself ;-)
Lasareth
Interesting info. Might it be a bug perchance?
Tactical-Dillusions
You can't use them in compettitive areas.