Ghostly Orb

From The Diablo 3 Wiki @ DiabloWiki.Net

Ghostly Orbs are a sort of monster generator, creating a wraith every few seconds until they are destroyed. They've only been seen in the WWI 2008 movie, when four of them emerge from the floor in a trapped room and begin producing wraiths as soon as they are active.

It's not yet known if they can turn out wraiths indefinitely or have a set number they may generate. Nor is it known if wraiths are worth experience or can drop items when they come from a Ghostly Orb.

Media

See Ghostly Orbs in screenshots and concept art in the Image Gallery.

A wraith emerging from a Ghostly Orb.