Sadly No
In "The Elder Scrolls IV: Oblivion," there isn't a direct equivalent to the drain skill glitch found in "Morrowind." While players can manipulate skills and attributes through various means, such as potions and spells, Oblivion's mechanics do not allow for the same level of exploitation as seen in Morrowind. However, players can still use techniques like spell crafting and item enchantment to temporarily alter their skills or stats. Overall, the gameplay and mechanics in Oblivion focus more on balancing and less on the kind of glitches seen in its predecessor.
If ure blade skill is 75
I think the best magic skill is fire coulomb damage
( http://www.uesp.net/wiki/Oblivion:Mysticism ) look under Skill Increases
I believe it is Palonirya, who has a Mercantile skill of 80, and the Master trainer for Mercantile also.
In "The Elder Scrolls IV: Oblivion," to create an Invisibility potion, you'll need to gather specific ingredients. Combine Hawk Feathers, Spider's Silk, and Nightshade using an Alchemy station. Once mixed, this will yield a potion that grants temporary invisibility. Remember to have sufficient Alchemy skill to ensure better quality potions.
If you're playing Oblivion on a Console: such as XBox, you're screwed. If you got it on PC then you can do what ever you want with the game, and btw you don't put cheats IN oblivion you write them inn, just push the button under "ESC" § List of Useful Cheats: Modpca Attribute XXX Switch out Attribute with: Strength - Intelligence - Willpower - Speed - Agility - Endurance - Personality - Luck, and Switch out XXX with the number you want the Attribute to Increase PS: you cannot have more than 255, if you do it'll go back to 0. Advskill Skill XXX Switch out Skill with: Any skill at all, such as Blade, Restorationa and Acobatics etc. and Switch out XXX with the number you want the skill to Increase PS: you cannot have more than 255, if you do it'll go back to 0. Also once you've cheated on the skill under 100 you will not be able to increase it manually. Find the rest by searching on the Internet for Oblivion Cheats. Such as Teleporting to Unknown Areas, Add & Remove Spells, Enter God-Mode etc.
The skill required to make potions is called Herblore. The main method used to raise (or "level") this skill, as with most skills, is using it. In this case, just make a lot of potions. See the related links for more specific suggestions.
When your conjuration skill reaches level 50.
If you mean your Characters speed, then you have to upgrade your Athletics skill.
Mysticism soultrap for enchanting your armor and wepons
Some special merchants/traders around Albion carry potions that give you experience orbs in the class potion you drank from (Strength, Skill, or Will)