Spell Codex: Iron's Spells 'n Spellbooks Addon
Modby SemSemSem
Spell Codex: Iron's Spells 'n Spellbooks Addon turns Iron's spell list into a progression-driven Spell Codex, wired into Spell Actionbar.
Type
Mod
CurseForge Downloads
29,999
CurseForge ID
1623374
Last Updated
Oct 11, 2026
Description
Spell Codex is a progression addon for Iron's Spells 'n Spellbooks. Spells are discovered into a Spell Codex, unlocked tier by tier with XP and ink, then equipped on a Spell Actionbar. You cast only what you have earned — from Iron's base schools and compatible school addons.
Requires Iron's Spells 'n Spellbooks and Spell Actionbar 1.1.6+.
The loop
- Discover spells into your Codex
- Open the Codex with the Spell Actionbar key (default `)
- Select matching ink, then press + to unlock the next tier
- Click an unlocked spell, choose a tier if asked, and place it on the action bar
- Cast from the action bar only
A built-in Guide (? beside the Codex) walks through each step with live illustrations. Progress bars under the Codex track school and overall discovery.
Discovering spells
- Empty Codex Page — Arcane Anvil: paper + Iron's ink (attuned to that rarity)
- Scroll Forge imprint — hold a school focus and a blank page in your hands, then use the forge (costs XP). Stronger ink blanks can imprint rarer spells
- Codex Pages — right-click to learn; found in adventure loot, and converted from Iron's scroll drops
- Leftover Iron's scrolls — right-click to absorb into the Codex
- Filled spellbooks — sneak + right-click to learn inscribed spells and empty the book; equip the empty book in Curios for more action bar slots
Spell Codex
- School tabs and a grid of discovered spells
- Action bar slots follow your equipped empty Curios spellbook (default 3 with no book)
- Horizontal scrolling for wide books and long school lists
- Ink slots under the panel for tier unlocks
- School / overall discovery progress bars
- Edit HUD — reposition the action bar + mana group and the cast/charge bar
- The action bar HUD stays hidden until at least one spell is equipped
Unlocking & casting
- + unlocks the next tier in order; costs XP and one matching rarity ink
- Hold a matching school focus for a 25% XP discount (ink still required)
- Respec refunds a configurable share of spent XP
- Casting is actionbar-only — Iron's wheel, books, inventory scrolls, and imbued weapons cannot cast for players
- Only unlocked tiers of discovered spells can be cast
What Specs changes
- Iron's scroll crafting is removed; spellbook crafting stays
- The Scroll Forge imprints Empty Codex Pages instead of crafting scrolls
- Scroll loot/drops become Codex pages; pages recycle in the Alchemist Cauldron for ink
- Spellbooks still craft, drop, and toss normally (empty before equipping for bar slots)
Pack & server tools
Synced JSON under config/specs_irons_spellbooks/:
- spell_blacklist.json / school_blacklist.json
- school_unlock_costs.json / spell_unlock_costs.json
- codex_settings.json (respec %, optional creative-only spells)
- known_spells.json reference list
Client HUD offsets: specs_irons_spellbooks-client.toml and Spell Actionbar's client config.
Admin: /specs_codex — schools, discoveries, give pages, list access.
Compatibility
Mod Loaders
Game Versions
Recommended Gear
AffiliateHardware and extras that pair well with this mod.
As an Amazon Associate I earn from qualifying purchases.
Screenshots
Similar Mods
Neo Otherworld Compatibility Fix
Fixed compatibility issues between multiple mods.
Fortune Ancient Debris
Using fortune on ancient debris gets you multiple netherite scraps
Costumes
This mod adds 15 special armors that looks like players and chacracters.
Cosmopolis Mod
A mod about space. adds a custom dimesnion with custom structures
AdaPaxels
A multitool which combines pickaxe, axe and shovel. Can make Paths and strip logs.
Arcane Engineering
An addon for Thaumcraft and Immersive Engineering