Elements

The main elements in Ragnarok Online are Neutral, Water , Earth , Fire , Wind , Poison , Holy , Dark (Shadow), Ghost , and Undead.

Chart
The rows represent the attributes of the spell or skill, and columns are the monsters attribute. The number indicates the amount of damage done to the monster (units are in percentage). The  indicates additional damage is applied (above 100%), and the  indicates damage is below 100% (in case of negative value, monster will gain HP from the attack).