Area of Effect's (AoE's) are spells which affect more than one target within a pre-determined radius. Some AoE's are aimed with a circle, others just
automatically effect targets around you.
AoE's are often used to eliminate many enemies at once. Some paralyze poison or do other damage the targets but they may also heal. These skills should not be used against one enemy only, seeing as it is slightly weaker than a one against one attack.
AoE's can be used by all classes but they are obtained at different levels.