Energy Rune

The Energy Rune is an item used primarily as ammunition for staves.

Rune Shrine
Using Unpowered Runes or Charged Runes on a Rune Shrine that is centered on an Energy Rune Shrine, will convert those Runes into Energy Runes. The player can only convert Runes into Energy Runes if their Runation level is 36 or higher.

Mob Drops
Energy Runes can be obtained as a drop from the following mobs:
 * Baroness
 * Clunkhead
 * Cotton Candor
 * C.R.E.E.P.
 * Kaiyu
 * Lightwalker
 * Mechbot
 * Rockrider
 * Runic Guardian
 * Spectral Wizard
 * Yellow Guardian

Rune Box
Energy Runes can be found when opening a Rune Box.

Rune Randomizer
Using Unpowered Runes or Charged Runes on a Rune Randomizer has a chance to convert them into Energy Runes.

Ammunition
Energy Runes are required as ammunition for the following Staves:
 * Atlantic Staff
 * Celestial Staff
 * Cryston Staff
 * Destruction Staff
 * Haunters Staff
 * Hive Staff
 * Kaiyu Staff
 * Lyonic Staff
 * Nature Staff
 * Reef Staff
 * Rejuvenation Staff
 * Shyre Staff
 * Sky Staff
 * Surge Staff
 * Web Staff

Banner Pattern
Crafting an Energy Rune with a vanilla Banner and a dye will give the Banner a pattern that resembles the Energy Rune's symbol.