De Rerum Dirennis - Alchemy Overhaul

⭐ ⭐ (329 endorsements) 📥 27,958 downloads 📌 v1.07.1 📅 6/11/2023
🟡 Updated this year

By qwerty · Magic - Alchemy

⬇ Download Mod Source: Nexus Mods ↗ 📅 Updated: 6/8/2026 📅 Created: 6/11/2023
⚠️ Install Order · 2 steps
1🛠️ OBSE — Oblivion Script Extender Download ↗
2🔧 UOP — Unofficial Oblivion Patch Download ↗

Install in this order, then this mod last — most mods fail to load without their framework and dependencies in place.

🔍 Analysis

  • 👍 1.2% endorsement rate — high engagement, a strong quality signal
  • 🏆 #6 of 10 Magic - Alchemy mods in this game by downloads

📋 About This Mod

Often overlooked by aspiring mages, Alchemy is a time-honored, rewarding discipline that can change the lives of those who master it. It is difficult, and often dangerous, to advance one's knowledge of the materials used in alchemical formulas, but continued study and hard work will, in the end, reward the alchemist greatly.

Alyandon Mathierry, "Fundaments of Alchemy"

Introduction

A standalone Alchemy overhaul, partially based on Alchemy modifications from older versions of Av Latta Magicka and expanded upon.

Kept separate, because Alchemy doesn't feel quite the same as other "magic" skills - and in fact it is considered a "stealth" skill in Skyrim.

Mod adds new effects to Alchemy skill and changes the way custom potion effects are calculate


Ingredients & Harvesting

Skyrim-Like Effect Learning

With this option enabled, ingredient effects are learned by combining them or eating raw. Any of the 4 effects are available regardless of skill.

Having a higher Alchemy skill now allows you to learn more effects when eating raw ingredient

Mod will keep track of learned effects regardless if this option is enabled or not. If you decide to re-enable it later, all your learned effect will be visible.

Skill-Based Harvesting

Your Alchemy skill now gradually affects the chance to successfully harvest an ingredient, up to +33% chance at level 100. Calculations also take Luck into account.

With Alchemy skill of 50+ (Journeyman) you can gather an additional ingredient when harvesting.

Ingredient Effects Balance Changes

Removed Cure Disease as first effect from some ingredients, so they can't simply be eaten. Same ingredients still have it, but not as a first effect.

Changed effects on ingredients which were the only source of some and therefore no potions could be made - this includes Nirnroot, Unrefined Greenmote and Ashen Remains.

Nirnroot now has some of the same effects from Elixir of Exploration, so it's plausible that this potion is actually made from it.

Replaced some useless effects on ingredients (mostly Damage Attribute variations).

Some vanilla ingredients had 4 identical effects for no particular reason. These now have different effects.


Brewing & Preparation

Skill Restrictions & Bonuses

You no longer can use 4 ingredients in potions from the start.

Novice alchemist can only brew potions from two ingredients.

With Alchemy s

🤖 AI-enhanced — based on mod data

De Rerum Dirennis is a script-based overhaul of Alchemy mechanics and skill perks for Skyrim. It targets players seeking deeper, more complex alchemy systems. With 329 endorsements and recent updates, it's a niche but actively maintained mod.

✨ Key Features

Overhauls Alchemy mechanics through script-based changes.
Revamps skill perks related to Alchemy.

📊 Pros & Cons

✅ Pros

  • Active development (updated June 2026) — you know it's not abandoned.
  • Solid community backing with 329 endorsements and nearly 28k downloads.
  • Script-based approach means deeper changes than simple stat tweaks.

⚠️ Cons

  • May conflict with other alchemy mods — you'll need to test load order yourself.
🎯 Is This For You?
For Skyrim players who want a more complex alchemy experience and are tired of vanilla's shallow mechanics. If you're a completionist who loves theorycrafting builds around alchemy, this could be your jam. Skip if you prefer lightweight tweaks — this is a full overhaul.
📦 Install:Medium· 5-10 minutes

💡 Beginner Tips

  • Use a mod manager like Vortex or MO2 to handle installation and load order.
  • Check for compatibility patches with other alchemy mods you use.
  • Start a new playthrough to fully experience the overhauled perk tree.

📊 Mod Details

Game
Oblivion Mods
Author
qwerty
Version
1.07.1
Downloads
27,958
Endorsements
329
Category
Magic - Alchemy
Created
6/11/2023
Updated
6/8/2026

🔧 How to Install Oblivion Mods

Download from Nexus.

📖 Full step-by-step install guide for Oblivion →

Visit the official mod page for specific installation instructions for this mod.

🎮 Need cheat codes or console commands? Check ur gaming wiki for Oblivion commands, item IDs, and more.

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