To make spells in The Elder Scrolls IV: Oblivion (including Oblivion Remastered), follow these steps:

How to Unlock Spellcrafting

• You need access to an Altar of Spellmaking , which is found only in two locations:
  • The Arcane University (requires joining the Mages Guild and completing some recommendation quests)
  • Frostcrag Spire , a player home north of the Imperial City. To unlock the altar here, you must:
    • Enter Frostcrag Spire (requires lockpicking)
    • Buy Magetallow Candles from the Mystic Emporium in the Imperial City Market District (costly, around a few thousand gold)
    • Use the candles on the altar to unlock it for spellcrafting

How to Create Spells

1. Interact with the Altar of Spellmaking to open the custom spell menu.
2. Choose a spell effect from your list of known effects on the left. You can only use effects from spells you have learned and that match your skill level (novice to master).
3. Adjust the spell parameters:
   • Range : Self, Target, or Touch
   • Magnitude : The strength or amount of the effect (e.g., damage or healing)
   • Area : The radius affected by the spell (10 to 100)
   • Duration : How long the effect lasts (1 to 120 seconds)
4. You can add multiple effects to create complex spells, but more effects increase magicka cost and gold cost.
5. Press "Create" to finalize your custom spell

Tips for Effective Spellmaking

• Start with simple effects like "Flare" (fire damage) or "Heal Minor Wounds" for early game.
• Be mindful of magicka cost and your level; powerful spells require higher skill levels and more magicka.
• Experiment with stacking effects for powerful combos, such as combining "Weakness to Magic" with damage spells to amplify damage

• Custom spells can be used for combat, buffing attributes, healing, or utility.

Using this system, you can tailor spells to your playstyle and create some of the most powerful magic in the game

. This covers the essentials of making spells in Oblivion.