Eternia Crystal

The Eternia Crystal is an event-summoning item. When used in the Eternia Crystal Stand, the Old One's Army event begins. The Eternia Crystal is purchased from the Tavernkeep for (pre-mechanical bosses), (post-mechanical bosses), or (post-Golem).
== Tips ==
* Players may wish to stock up on Eternia Crystals before defeating the mechanical bosses, in order to save coins.
* Due to the price increase, it is possible to buy Eternia Crystals beforehand and sell them after the battles, netting a total profit of per crystal (This no longer works on desktop; the price you sell the crystal for is based on the price you bought the crystal for regardless of which bosses you have defeated).
** This is not possible on the ; they sell for even post-Golem.
== History ==