Iron's Spells 'n Spellbooks Dynamic Skill Trees

Mod

by RaiRaimu

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

Type

Mod

CurseForge Downloads

2,348,319

CurseForge ID

1238317

Modrinth Downloads

149,337

Modrinth ID

cdEXZLO4

Last Updated

Nov 7, 2026

Description

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

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.