Steam rune

Steam runes are combination runes. They count as two separate runes: one Fire rune and one Water rune. Thus, any spell requiring one Fire rune, one Water rune or both will spend only one Steam Rune.

Runecrafting Steam Runes
At Runecrafting level 19 or higher, they can be crafted in either of two ways:
 * Pure essence, Fire runes and a Fire Talisman to the Water altar or
 * Pure essence, Water runes and a Water Talisman to the Fire altar.

Players receive 10 experience for combining Water runes at the Fire altar and 9.5 for combining Fire runes at the Water altar. Combinations have a 50% success rate (or 100%, if the player is wearing a binding necklace and the talisman is consumed in the process (unless the player uses the Lunar spell Magic imbue).

Miscellaneous

 * The Steam Battlestaff provides an unlimited amount of these runes when equipped.

Spells

 * Teleport to Ape Atoll
 * Bake Pie
 * Humidify
 * Magic Imbue

Trivia

 * As with all combination runes, the most amount needed for a spell is 30, for the Charge Orb spell series.
 * This is one of the combination runes released with the abyss update.
 * The value of 1 Steam rune in Investment Credits in Mobilising Armies is 7 Investment Credits.
 * The Steam runes inventory icon, along with the other combination runes, was unaffected by the update on 9 June 2010. The other runes were slightly twisted.