Magic I : Total XP: 125,260. Casts (very roughly): ~5.000. Time to complete: 16 to 40 hours. School I : Total XP: 91,000. Casts (very roughly): ~3,500. Time to complete: 12 to 30 hours. School II : Total XP: 91,500. Casts (very roughly): as above Time to complete: 12 to 30 hours. Magic II : Total XP: 135,550. Casts (very roughly): ~5.000. Time to complete: 18 to 48 hours. Reasoning : Average XP per cast: around 25-30 XP (midpoint of 1–50 XP) assumes a balanced mix of low-XP and high-XP casts. Early game may lean toward 1-3 XP casts, while late game may favor 30-50+ XP, making 25-30 XP a reasonable average. 5 casts/minute: Represents fast-paced combat (300 casts/hour). Times of 12-18 hours are below 20 hours for Tiers 2 & 3 (15 skills) and close for Tiers 1 & 4 (97 and 44 levels), fitting their scale in a grind-focused RPG. Slower play (2 casts/minute) extends to 30-45 hours, suitable for casual players. Balance: Fixed 250 XP for Tier 1’s first 8 levels for early progression. Tiers 2 & 3 are quick, reflecting smaller skill counts, while Tier 4 suit the end-game role of Eldritch school.

Yes. Iron's Spells 'n Spellbooks Dynamic Skill Trees is free to download from Modrinth. Its license is MIT.

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Use “Add to a server” on this page, or open NxLabs from your dashboard. We install it, restart your server and switch it on.

Iron's Spells 'n Spellbooks Dynamic Skill Trees

About Iron's Spells 'n Spellbooks Dynamic Skill Trees

From Modrinth

This mod adds 4 dynamic skill trees for Iron's Spells 'n Spellbooks through Pufferfish's Skills

This datapack/mod aims to enhance the progression system in Iron's Spells 'n Spellbooks by introducing four dynamic skill trees that grow together with your magical power.

Compatible with 1.20.1 and 1.21.1

Compatible with T.O. Magic 'n Extras

Compatible with Alshanex's Familiars and every other add-on!

***

General

The progression concept is straightforward: initially, you'll focus on improving your overall magical abilities (Magic I). Afterward, you'll unlock the option to specialize in a school of magic of your choice (Primary School), followed by the ability to select a secondary school (Secondary School). Finally, you'll achieve mastery in the magical arts through Magic II.

The Primary and Secondary school specializations are mutually exclusive, meaning you can only have one Primary and one Secondary school choice. However, the mod includes a "Reset School" skill that allows you to reset your skill tree while retaining your experience. This reset is entirely client-side, so players don’t need to ask server admins for assistance if they want to change their choices or correct a mistake.

Notes

You gain XP by casting spells. The rarer the spell and the higher its mana cost, the more XP you earn. Eldritch spells grant additional XP.
Each tier requires progressively higher amounts of experience and/or increased skills cost.
School progression earns XP from any spell you cast. Creating eight dynamic skill trees that get XP only from one specific school would be incredibly tedious and result in a poor UI, based on my experience!

Dependencies

Iron's Spells 'n Spellbooks
Pufferfish's Skills
Pufferfish's Attributes
Pufferfish's Unofficial Additions

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Skills Details

Below are the maximum buffs applied through completing all the skill trees. Some choices are mutually exclusive with each other, that's why the ranges:

Spoiler

- Spell Power: +0.38 / +0.44
- Spell Resist: +0.30 / +0.39
- Cooldown Reduction: +0.30 / +0.39
- Max Mana: +165 / +195
- Mana Regen: +0.29
- Primary School Power: +0.20
- Secondary School Power: +0.15
- Eldritch Spell Power: +0.19

Reworked Experience Progression

Spoiler

Magic I:

Total XP: 125,260.

Casts (very roughly): ~5.000.

Time to complete: 16 to 40 hours.

School I:

Total XP: 91,000.

Casts (very roughly): ~3,500.

Time to complete: 12 to 30 hours.

School II:

Total XP: 91,500.

Casts (very roughly): as above

Time to complete: 12 to 30 hours.

Magic II:

Total XP: 135,550.

Casts (very roughly): ~5.000.

Time to complete: 18 to 48 hours.

Reasoning:

Average XP per cast: around 25-30 XP (midpoint of 1–50 XP) assumes a balanced mix of low-XP and high-XP casts. Early game may lean toward 1-3 XP casts, while late game may favor 30-50+ XP, making 25-30 XP a reasonable average.
5 casts/minute: Represents fast-paced combat (300 casts/hour). Times of 12-18 hours are below 20 hours for Tiers 2 & 3 (15 skills) and close for Tiers 1 & 4 (97 and 44 levels), fitting their scale in a grind-focused RPG. Slower play (2 casts/minute) extends to 30-45 hours, suitable for casual players.
Balance: Fixed 250 XP for Tier 1’s first 8 levels for early progression. Tiers 2 & 3 are quick, reflecting smaller skill counts, while Tier 4 suit the end-game role of Eldritch school.

***

Credits

Thanks to TGxRedPlayer for the initial help, to Cadentem & to everyone involved in the Iron's/Pufferfish mods! :)

Highlights

From source data

Game versions

Supports 3 Minecraft versions, the newest being 1.21.1.

Loaders

Runs on Forge and NeoForge.

Footprint

Rated a light load on a server.

What kind of mod it is

From the catalog

Listed on Modrinth as “Mods”

World generation

Changes or adds to how new terrain, biomes and structures are created.

Runs on your server

From source side support

Modrinth lists Iron's Spells 'n Spellbooks Dynamic Skill Trees as required on the server. Check its Modrinth page to see whether players need it too.

Compatibility

Game: Minecraft
Loaders: ForgeNeoForge
Runs on: Serverrequired on the server
Game versions: 1.21.1 and 2 earlier

Verified at the source

✓ModrinthOfficial listing, checked 2026-10-01Open ↗
✓AuthorRaimu, as published on Modrinth
✓LicenseMITFree

Iron's Spells 'n Spellbooks Dynamic Skill Trees

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