Eternia Crystal (NPC)

The Eternia Crystal NPC is a background object in the Old One's Army event. Right-clicking the Eternia Crystal Stand with an Eternia Crystal in inventory will place the Eternia Crystal on the Eternia Crystal Stand, and spawn the Eternia Crystal NPC. After a 5-second countdown, the Eternia Crystal NPC must be protected from waves of enemies from the Old One's Army who will be seeking to destroy it. If the Crystal is destroyed, the event terminates. If it is kept "alive" until all waves are cleared, the event is defeated.

Both the Eternia Crystal and its Stand are purchased from the Tavernkeep NPC for coins. A long, flat surface is required in order to place the Eternia Crystal successfully and summon the event; otherwise, the Eternia Crystal will reject the area and pop away, returning to the player's inventory.