Click animation for full size
Earth Strike, a free-to-play magic spell, is the weakest earth spell in the standard spellbook. It requires one Earth rune and one Air rune to cast. The base damage of this spell is 86, and it scales up to 268 at 28 Magic.
This is one of the few attack methods that can damage Salarin the Twisted. When used against him, the spell will either "miss" or deal 110 damage.