Magic-Users, Healers, and Hybrid classes all utilize spells for in combat and out of combat. Spells are purchased from merchants, created using special tradeskills, and are found on defeated enemies in certain areas. They appear as scrolls and must be copied into the character's spellbook then memorized in order to use.
Skills are special abilities for in combat and out of combat that every class receives. Classes lacking spells tend to receive a greater amount of skills to compensate for having no magic to utilize. Hybrid classes also receive a good number of skills but they tend to be weaker versions of those full melee classes are given.