Athletics
Acrobatics
Armourer
Alteration
Alchemy
Blunt Weapons
Blade
Block
Conjuration
Destruction
Hand to hand
Heavy Armour
Illusion
Light Armour
Mystisysm
Marksman
Mercantile
Restoration
Security
Speechcraft
Sneak
you use them
magical skills, blade, blunt or block. choose from them.
conjuration, destruction, alteration, illusion, mysticism.
you level up and then upgrade your magic skills
you can't level up with minor skills. only your major skills level you up. you can still level up minor skills even after you reach your max.
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No, you can only level up with your major skills, minor skills will only give you extra points in your attributes when you level up.
You don't need to be in a city to level up skills.
It is as are all the DLC for the game
there are no cheat codes or glitches that work for oblivion because they have found them all.
No. The daedric realm, Oblivion, has no single ruler. While some of the daedric princes are more powerful than others, they all rule over their own domains.
In my opinion, Oblivion is the better game. It is a free-for-all game such as Fallout.