Cast Speed is an offensive attribute, and affects the speed at which a character casts spells. Characters with higher Cast Speed will cast spells more often, and thus increase their damage per second or healing per second.
All classes that cast spells want to maximize their Cast Speed attribute. However, the ways in which players can increase their Cast Speed are limited.
A high Cast Speed attribute is important for all classes that cast spells, but there are just two pieces of equipment in Aion that will increase a character’s Cast Speed; weapons and hand slot armor. In addition to equipment, players can increase their Cast Speed with buffs, titles, and other special means.