Iban Blast is a combat spell that is unlocked after completing the Underground Pass quest. It can inflict up to 25 hitpoints of damage. To cast the spell, a player also needs to be wielding Iban's staff.
The spell can be cast a total of 120 (2,500 casts if Iban's Staff is charged) times before Iban's Staff needs to be recharged in the Underground Pass at "The Flames of Zamorak" well. When used against players, two charges are used instead of the usual one.
Trivia
- Prior to the 24 July 2014 update, Iban's staff held 1,500 charges max when fully charged.