Speak to 5 ghosts in the various graveyards across Norrath and convince them to return to the Ethernere. This can be done in any order. Note: Some will attack you but not all. it appears to be random, though in-general the NPCs with quest bubbles over their head will not attack (and the ones without will attack after the dialog). Please also note that the names of the NPCs may be interchangeable throughout the game. Locations include the following.
This article refers to events, personae and activities only present in-game during the annual Nights of the Dead festivities, which come to Norrath each year from (roughly) mid- to late-October through to early- to mid-November.