Runescape how do you use ice barrage?

Answer 1

get the runes: death rune, smoke rune, ice rune, and an ancient staff

go into quests and make sure that you have done dwarf cannon

if you have, cast the spell

The above is wrong in many ways... You must first do the quest "Desert Treasure". Then you must achieve 94 magic. The runes you need are 2 blood runes, 4 death runes, and 6 water runes. You do not have to do dwarf cannon to use ice barrage. Thank you for your time.

Answer 2

Have 94 magic and completed desert treasurequest.