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Minecraft: Java Edition
1.20.1
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Licensed ARR
Published last year
Updated 7 hours ago
Changelog
- Updated entity getter to force-get entities, bypass entity filtering.
- Moved damage logic from
setHealth()tohurt(), and madesetHealth()just callhurt(), meaning some mobs can now dodge/blocksetHealth(). - The
BossEntityhurt()method now doesn’t callsuper.hurt(), so it doesn’t use any vanilla behaviour. - Updated access checker to make it more resilient against bypasses, even though I hadn’t seen any bypasses for the original one.
- Updated the name of the mixin-remover-class-visitor.
- Removed a random print statement that I left in the mixin-remover-method-visitor.
- Improved handling of coremod when it fails on JVMs that don’t have the Attach/Tools API (
com.sun.tools.attach). It now uses reflection to access certain things, instead of a direct reference, so it is catchable and won’t crash the game – instead falling back to events/disabling some features, as intended. - Fixed some bugs related to Metapotent Flashfur when the coremod failed, or was disabled, like the Meta-Beam not showing up.
- Coremod config value moved to
omnimobs-common. If you disabled the coremod previously, you might need to disable it again. (Except it might not crash anymore, so that might not be required.) - Fixed incorrect logging in the coremod, saying “Transforming ServerLevel…” when it was actually transforming
MinecraftServer. - The coremod (Java agent) temporary file is now set to delete on exit. (So it won’t clutter the OS’s temporary files directory.)
- The agent JAR file is now extracted with a
try-with-resourcesstatement, meaning if it fails at this step, the file stream will still be closed. - Fixed stars and light rays rotating with Metapotent Flashfur.
- Updated Metapotent Flashfur’s stars to last twice as long on average.
- Fixed Metapotent Flashfur’s walk animation, making it smooth.
- Updated Metapotent Flashfur’s Meta-Beam to vaporise entities. (They don’t play their death animation.)
- Added Object-Oriented ability/move system and ported Silverlight (and Flashfur’s Invulnerability Detection) to it. This allows for cleaner code, and context-aware moves! (I’ll port the other mobs fully, when they get a big rework, and all new mobs will probably use it!)
- Updated Silverlight a bit, due to the fact I ported him to the new OOP system. He should hopefully feel less “spammy”.
- Updated
UnsafeUtilto make a new instance ofUnsafe, instead of getting the existingtheUnsafefield. This doesn’t matter much (it’s only used to attach the agent), but I prefer doing it this way. It’ll fall back to the other one just in case. - Updated the music system to use an
IMusicEntityinterface, meaning both Boss entities and Metapotent Flashfur use the sameBossMusicclass. (In other words, there is less duplicated code, as theBossMusicclass only cares about anIMusicEntity, and not a specific implementation!) - Changed Flashfur’s and Iron Golem’s music, because of potential issues using the original ones. Original music:
- Made it so Boss entities can target entities that can’t normally be targeted. (For example, entities with the
invulnerableflag set totrue.) - Added a spark particle effect when Alarm parries an attack with his sword.
- Made it so the camera shake doesn’t shake when the game is paused.
- Fixed Metapotent Flashfur not saving on Windows (hopefully), by upgrading file management to use
java.nio.file, meaning it’ll automatically handle/vs\. (I use Linux, so I can’t be 100% certain it works!) - Made it so Metapotent Flashfur cannot have a damage overlay or death animation.
- Fixed camera shake becoming intense upon world reloading. (The intensity value persists upon world reloading, instead of resetting.)
- Made Metapotent Flashfur’s lightning brighter.
- Changed force-setHealth and Flashfur’s invulnerability detection to use approximate equals, and not exact equals, to account for floating-point errors.
- Added checks to the
knockback()method for Boss entities. - Improved target setting immunity and target cancellation immunity for Boss entities.
- Improved some other things related to Boss entity defence.
- Reworked Entity Remover, adding a GUI with a
die()toggle, leave-level calls toggle, invulnerability toggle, immovability toggle, and a/kickban toggle. This should help with OP mobs from other mods killing you, teleporting you, or kicking you out of the world. - Updated defence against
CompoundTagmodification, so when getting the value of an Omni-Mobs tag, it returns0. I also changed some other small things. - Improved Flashfur’s invulnerability detection against players.
- Added some basic tests so it’s less likely that I’ll release a version with broken calculations, in the future. I will probably expand the amount of tests later. JUnit didn’t seem to work, so I had to make my own. They’re off by default, but you can enable them in the config.
- Updated icon, because the mod isn’t just about Flashfur anymore, and made it show in the mod. I might change the icon again at some point.
- 5% of the damage dealt by Boss entities now ignores vanilla defences such as armour and resistance.
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AlphaVersion number
0.3.4Loaders
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1.20.1Downloads
134Publication date
November 7, 2025 at 12:52 AMPublisher

Flashfur
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