Earth blast

Earth blast is a combat spell available at level 53 Magic. It costs 4 earth, 3 air, and 1 death rune to use, yields 126 experience when cast successfully, and is a strength 11 missile attack.

During the Family Crest quest, the player must successfully cast each blast spell (Wind, Water, Earth, & Fire) once on the demon Chronozon in order to weaken him before he can be defeated. Failure to do so will cause his Hits to recharge, although any successfully cast blast spells will not need to be recast in an ongoing fight.