Build A Spell — Shield Spell Fix & Spell Interaction Improvements

This is a small, standalone compatibility patch for Build A Spell 1.0.3 on Minecraft 26.1.2 (NeoForge).

Originally developed to address problems with the Shield spell component, version 1.1.0 expands the patch to correct several unintended interactions between spell effects and modifiers. The goal is to preserve Build A Spell's flexibility and powerful spell combinations while preventing unintended behavior, excessive terrain destruction, and exploitable mechanics.

Conjure + Wall - this is the major change in this update

Walls are now by default only 1 block thick. To make them thicker, add increasedArea. To increase their height and width, add Fill.

Shield Spell Fixes

The original patch addressed two issues with the Shield spell component:

1. Shield functionality: Under certain configurations, Shield may fail to provide its intended protective effect.
2. Shield stacking: Repeatedly casting Shield can cause absorption to accumulate beyond the intended limits.

The patch corrects Shield's absorption-stacking behavior so repeated casts do not continually add protection. Stronger Shield spells can upgrade existing absorption, while weaker or equivalent casts cannot increase it through repeated casting.

This preserves Shield as a useful defensive spell without allowing effectively unlimited absorption.

Spell Interaction Improvements — v1.1.0

Version 1.2 introduces additional fixes for several combinations involving Break, Chain, Fill, Conjure, and Evaporate Water.

Break + Fill — Preventing Massive Excavation

Combining Break with Fill could previously cause a single spell to excavate enormous volumes of terrain, potentially destroying over 4,000 blocks with one casting.

This combination is now disabled in the spell-building interface. Previously created spells containing Break + Fill will behave like ordinary Break spells rather than triggering massive area excavation.

This prevents an unintended shortcut around mining progression while preserving the normal functionality of Break.

Break + Chain — Controlled Mining

Break + Chain has been improved to support controlled excavation of nearby blocks of the same type.

• Each Chain level can affect up to 8 additional blocks.
• The maximum is 32 additional blocks per casting.
• Additional targets must match the original block type and satisfy the spell's normal hardness restrictions.
• The interaction respects applicable Fortune and Gentleness effects.

This makes Break + Chain useful for mining veins of ore or clearing matching materials without allowing uncontrolled destruction of the surrounding terrain.

Conjure + Floor + Fill — Large Platforms

The previously ineffective Conjure + Floor + Fill combination has been modified to construct a flat, horizontal platform.

Rather than attempting to generate a large three-dimensional mass, the spell places material outward from its target location in a single layer.

The default configuration supports a substantial construction area while limiting each casting to a maximum of 4,096 block placements.

The spell uses Build A Spell's existing restrictions on conjurable materials and does not overwrite ordinary solid blocks.

Evaporate Water + Fill — Controlled Evaporation

Combining Evaporate Water with Fill could cause unintended large-scale water removal.

Fill is now disabled for Evaporate Water in the spell-building interface. Existing spells containing this combination will use the ordinary Evaporate Water behavior.

This preserves the spell's intended utility without allowing Fill to amplify it into an excessively large area effect.

Compatibility and Installation

Requirements:

• Minecraft 26.1.2
• NeoForge
• Build A Spell 1.0.3

Install this patch alongside the original Build A Spell mod. It does not replace Build A Spell, and the original mod must remain installed.

For multiplayer, install the patch on both the client and server. When upgrading from an earlier version, remove the previous Shield Fix JAR before installing the new one.

No world reset is required, and previously created spells remain loadable. Some existing spells containing newly restricted modifier combinations may need to be edited to remove unnecessary mana costs.

About This Project

This patch was originally created for the Eldritch Aeons modpack, a dark-fantasy magic and exploration pack emphasizing interconnected magical systems and deliberate spell progression.

Although developed for Eldritch Aeons, the patch is fully standalone and can be used in other compatible modpacks.

Its purpose is to provide targeted fixes without substantially changing Build A Spell's original design, spell progression, or overall balance.

The patch is intended as a temporary compatibility solution until the underlying problems are addressed in an official Build A Spell update. Once equivalent fixes are incorporated upstream, this patch may no longer be necessary.

This is an unofficial community patch and is not affiliated with or endorsed by the original Build A Spell developer.