In essence, your character will level up after you've increased a Major Skill ten times and rest at any bed, allowing you to increase your character's Attributes. Basics of leveling, including what each Attribute and birth sign does, can be found in our Oblivion Leveling guide. If you've never played Oblivion before, you need to understand how leveling works, as Oblivion has arguably one of the strangest and most punishing leveling systems in an RPG.