Power Rune

The Power 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 a Power Rune Shrine, will convert those Runes into Power Runes. The player can only convert Runes into Power Runes if their Runation level is 59 or higher.

Mob Drops
Power Runes can be obtained as a drop from the following mobs:
 * Baroness
 * Clunkhead
 * Graw

Rune Box
Power 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 Power Runes.

Ammunition
Power Runes are required as ammunition for the following Staves:
 * Baron Staff
 * Concussion Staff
 * Destruction Staff
 * Everfight Staff
 * Evermight Staff
 * Lightshine
 * Mecha Staff
 * Power Staff
 * Show Staff
 * Surge Staff
 * Ultimatum Staff
 * Warlock Staff
 * Wizard Staff

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