Eternal Power Capsule

The Eternal Power Capsule was a Legendary Crafting Material in Diablo III. It requires a Character Level of 1 to use, is account bound, and may be stacked up to 1000 times. It was required for the crafting of Arcane Barb legendary crossbow. As of patch 2.0.6., it no longer drops, and existing Capsules may be sold for 50,000 Gold.

The item had a chance to drop off the unique Cuddle Bears in Whimsyshire:
 * Evil Oliver
 * Tubbers

Tubbers was a happy bear who often dreamed of frying the friendly unicorns with arcane energy.