Storm Rune

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

Rune Shrine
Using Charged Runes on a Rune Shrine that is centered on a Storm Rune Shrine, will convert those Runes into Storm Runes. The player can only convert Runes into Storm Runes if their Runation level is 49 or higher.

Mob Drops
Storm Runes can be obtained as a drop from the following mobs:
 * Corallus
 * Dracyon
 * Shadowlord
 * Voxxulon

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

Rune Randomizer
Using Charged Runes on a Rune Randomizer has a chance to convert them into Storm Runes.

Ammunition
Storm Runes are required as ammunition for the following Staves:
 * Atlantic Staff
 * Candy Staff
 * Concussion Staff
 * Lightning Staff
 * Noxious Staff
 * Sun Staff
 * Tangle Staff

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