Deals Earth Damage (in a descending order) over time.
This spell seems only takes the Magic Level into account, not the Level to determine how much damage you will deal to the target. The spell causes damage every 4 seconds, while the damage value falls logarithmical until it vanishes. To players it does only half of the damage it would do to creatures.
For example, at Magic Level 110 the damage to a monster that is neutral to earth in average starts at 84. In total summing up to 1700 HP after 400 seconds.