Fireballs are an elemental node in the Runespan that allows players to draw fire runes from it. They are found on all floors. It requires level 14 Runecrafting and gives experience in cycles of 34.8 experience each, though occasionally will also give 2 experience when a failed siphon is performed. With this experience rate, the fireball becomes the second-best node to siphon from for free-to-play players, with the fleshy growth being the best, and the vine following closely in third place.
Unlike creatures, players do not receive any rune essence when a node is depleted of its energy.
- A permanent but non-interactive version, simply called "Fire", could be found on an experiment plinth on the 1st floor[UK]2nd floor[US] of the Wizards' Tower along with similarly non-interactive versions of a chaotic cloud, rock fragment, cyclone, shifter, and nebula.
- Very rarely, a fireball sprite will appear, but you can only tell that it is there by the emblem on the ground. You can syphon it normally. This glitch has yet to be fixed.