Tensura: Iron’s Spells ‘n Spellbooks – Growth

Tensura – Iron’s Spells Growth

A NeoForge mod for the Tensura RPG pack (MC 1.21.1) that gives Iron’s
Spells ‘n Spellbooks gear a full evolution progression along Tensura’s own EP
ladder. The official integration (tensura_iron_spells) ships every spell
book, mage
armor set and spell weapon as a flat terminal EP band: gear that earns but
never climbs. This mod re-weaves those bands into chains. Armor sets, spell
books and weapons each forge upward, fork at gates, and hand off into Tensura
metals, so a wizard’s kit grows with their power instead of stalling at its
spawn floor.

What it does

(Design phase. No release has been cut yet. The open issues on this repository
hold the full plan, research tables and open design decisions.)

• Re-weaves the official integration’s bands. Same-path overrides of the
  tensura_iron_spells gear files plus Gear Evolution addon chains, following
  the house doctrines: native floors and EP rates preserved, no tier skips,
  fork points inert with chains, terminals keep earning.
• Spell books climb their tier ladder: wimpy, copper, iron, gold, diamond,
  netherite and legendary, plus the school books (ice, blaze, druidic, evoker,
  necronomicon, cursed doll, dragonskin), each progress rather than sit
  terminal.
• Mage armor sets and spell weapons weave upward toward the Tensura metal
  spine at the same gates Tensura gear of that tier climbs.
• Covers gear the official integration misses: frosted helve, staff of the
  nines, claymore and cinderous soulcaller. The plan’s other four candidates
  ("improved blood staff", "illusioner spell book", truthseeker and the base
  spell_book) exist only as orphan model/lang entries in Iron’s Spells
  3.16.3, with no registry id and nothing to band (verified by scanning every
  class in the jar, and by the datapack GameTest).
• Optional addon integrations, inert when the addon is absent: AllTheWizard
  Gear (allthemodium/vibranium/unobtainium mage gear), Wind Spellbooks (wind
  school, aeromancer set, wind staff), Leylines (ley staff, leyline codex),
  Resonant Arcana (deathchill/phoenix/runic echoes spell books).
• Entity existence bands where the official integration leaves gaps (for
  example Wind Spellbooks’ aeromancer mob).

Re-banded files

Every row below is generated from the datagen tables in
RebalanceContent.
The Java tables are the single source of truth, and validation fails the
build on any drift: 87 same-path overrides + 9 addon chains + 5 Tensura
receiving rungs = 101 files.

Native epGain is preserved exactly. Where the official file states 0.02,
the override writes 0.02; where it omits the key (35 files), the override
omits it too, so Tensura’s codec default 0.03, the item’s true native
rate, applies unchanged. Only the nine chain entries carry an explicit
0.03, because Gear Evolution requires the key there.

Hand-offs to Tensura mithril are single-target rungs (maintainer decision
on D1 in #1). Forks are used only where equivalent sibling options exist
(within-tier spell books); GE forks choose among distinct target items, so
"keep earning" is not a branch option, and a chain entry would make Gear
Evolution strip the official milestone spine this mod preserves.

Spell books (16)

Weapons (18)

Armor (53)

Tensura receiving rungs (5)

Shipped at data/tensura/gear_existence/, byte-aligned with the same-path
rungs already established there, so the hand-off carry lands exactly on the
rung’s floor instead of past base Tensura’s mithril gate:

Optional addon integrations (27 files)

Bands for the four ISAS addons. The files ship unconditionally and are inert
when the addon is absent (item-id lookup simply misses). Placement per D4 in
#1; epGain is omitted everywhere it has no native source, so the codec default
0.03 applies, except the aeromancer set which joins the school weave at the
stated 0.02.

Without an addon installed, GE’s resolver drops its absent targets: the
netherite fork rolls among the five ISAS books, the diamond fork among the
three ISAS school books, and the addon bands simply never match an item.

Structure magicule + spawn exemptions (infinite-dungeon-spawn-safety)

Every ISAS-family structure lifts the surrounding chunks to at least the
related mobs’ EP baseline (datapack rows read by infinite-dungeon-spawn-safety).
Each row carries only the floor; the reach is derived by the consumer
(clamp(sqrt(baseline) * 0.35, 48, 320) blocks), so the catacombs radiate
across ~121 blocks while the 6,000-baseline dens stay near the 48-block floor:

wayward_compass_locator is a locator (not a structure) and priest houses are
vanilla village pieces (no structure id) – both out of scope. The ISAS bosses
dead_king and fire_boss are exempt from the spawn-safety gate and
spawn wherever their encounters take them.

Entity existence (1 file)

Banded at the official integration’s wizard-mage tier (the cryomancer /
priest / pyromancer bands). Leylines’ nightborn_elf is worldgen/faction
content, not a combat mob, and is deliberately unbanded; the official 18
ISAS bands are untouched (D2 in #1).

Dependencies

Credits

• Built on NeoForge.
• Integrates Iron’s Spells ‘n Spellbooks
  and Tensura: Reincarnated.

License

GNU Lesser General Public License v2.1 – see LICENSE.
Copyright (c) 2026 Bitwise Madness.

AI disclosure

Parts of this project were written with the assistance of AI coding tools.
AI-assisted code, data and documentation ship only after human review by the
maintainers.