Fire Surge

Fire surge is the most powerful fire spell and strongest of the combat spells in the standard spellbook, and it requires 95 Magic to be cast. Its max damage without bonuses is 280. With boosts, it deals a maximum damage of a hefty 420 (with the Staff of light and extreme magic or overload potions) while a Hexcrest or Full slayer helmet is being worn while casting this against an assigned slayer monster. This spell was introduced with the 17 November 2009 update.

This spell has a much greater damage capacity against ice strykewyrms, hitting approximately 1096 with full bonuses active.

'''Fire Surge costs coins for each cast. If using an air staff, the price is reduced to coins per cast. If using a fire staff, the price is reduced to coins per cast. If using a Staff of light, there is a 1/8th chance that all runes for a damage-inflicting spell will not be used up. The chance can be improved to 1/5th by wearing Combat robes. The chance is improved to 1/2 by wearing Battle robes, although when using combat or battle robes you also have an additional chance to save either mind, chaos, death or blood runes. Any elemental runes will still be needed.'''