Boss - Unbelievable Custom Monsters v6.1.0

Advanced custom monsters & AI plugin with skills system and a clean UI. Folia supported.
Announcement from kangarko:

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30-Day Unconditional Money Back Guarantee

The most versatile custom entities plugin with skins, AI and placeholder support and a clean GUI.



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Discover Custom Mobs Updating
One last feature that did not quite fit into the artwork above... Each time you change your custom animals or custom entities in the GUI, they will update automatically in your worlds!

boss-live-updating-demo.gif



Is Boss™ for me?
Below I have tried to enumerate many sticking points I personally met when I had a server with 30k unique players, and that this plugin will help you with.
  • Do you find the default Minecraft mobs boring and wished you could change them?
  • Do you get bored killing the same mobs again and again?
  • Do you have monster arena plugin on your server and wish to improve it dramatically?
  • Have you ever had an idea of a monster dropping special key to unlock some part of your server?
  • Do you players abandon your survival server after some time because they "seen it all"?
  • Or generally if you feel like you're losing players on your server, this plugin may help you gain it back.

Remember, THIS IS NOT THE MAGIC PILL (but it may be a close to). The best solution to having a quality server at the first place is CARING. Here is some general advice that apply regardless if you will buy this plugin:
  • Be mindful about how you structure your gameplay and your worlds. Sometimes less is more.
  • Install a minigame plugin that will keep player engaged while they are not playing.
  • Consider having a multi-world plugin like Multiverse-Core that enables you to have multiple worlds
  • Install a dynamic map like DynMap so you motivate players to track themselves in the worlds.
  • Read the Spigot change-log often, try to understand the changes and update your Spigot accordingly (every second day at minimum on new Minecraft versions, otherwise once a week is in my opinion enough).

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Frequent Questions

What mobs can be made Bosses?
Any spawnable entity in Minecraft from pigs to zombies to Ender Dragons, and if you have Citizens installed, even player NPC Bosses.

Will Boss work with MythicMobs or similar?
Yes! Boss has been reported and tested to work with another custom monsters plugins.

Can I make animals aggressive? Example: Chicken attacking players?
Yes! Since Boss 4, we support Citizens integration with custom pathfinders and goals. Even sounds and skins for player Bosses are customizable!

Is there a way to spawn the Boss without a spawn eggs?
Many ways! You can create spawn rules such as spawn Boss every Friday at 17:00 your local timezone, spawn Bosses naturally, replace vanilla mobs, or spawn Bosses when entering a region.

Also, you can spawn Bosses from placing eggs into a dispenser, or running "/boss spawn" command. You can even make a Command Block run this command to spawn them, or use our developer API to code in your own way.

Can I run a custom command when the Boss is spawned or dies?
Absolutely, under 2 minutes if you use our clean GUI, open your Boss > Settings > Commands window and configure.

Is it possible to let Bosses spawn if you enter a region?
Absolutely, under 3 minutes if you create a spawn rule using our GUI, type /boss menu and select Spawning to start. You can even force Bosses to stay within the same region!

Minimum Requirements
Java 21 or greater
Spigot or Paper, 1.8.8 - 26.1 or newer except most 1.16/1.17 builds due to conflicting library issue.

Folia is in beta support starting in Boss 6.


Developer API
You can find our developer API with documentation on which class are available as well as how to add own, unique skills, here.

Customer Support
Need help? Open an Issue on GitHub. All questions are answered within 0-5 days, often sooner.

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Latest reviews

Amazing plugin 10/10, I recommend it, BUY IT ! Support is amazing, developer is amazing too, developer is more amazing than the Boss Plugin. 11/10
kangarko
kangarko
Thank you very much, glad you enjoy the plugin!
Boss 6 has replaced MythicMobs and all of the alternatives we've tried. I use this plugin for bosses, NPCs and my dungeon setup as well as just buffed up mobs. The skills you can add to the bosses to spice things up are awesome and I was excited to test the new update early!

Thank you for many years of updating the plugin and providing a great service. Repurchased here to support the author. I wish all devs took example from this.
kangarko
kangarko
Thank you! Pleasure working with you and really appreciated your kind words!
It's been lovely using this plugin. I'm especially surprised when my suggestions are implemented over github. Just a quick question, what does 1 year support means? Do my plugin stop working after 1 yr or just no longer qualify for support and wont be able to download future updates? I mean, I am very much happy to pay the yearly as of this writing. Just concerned if I missed the payment, my plugin will stop working.

If you are looking for something a little bit easy to understand and setup for your server, I highly recommend this plugin.
kangarko
kangarko
Hey Mizake!

Thanks for your kind words, of course, happy to implement great ideas from our community!

After one year, the plugin will continue to work normally. You can even keep using it for free and compile the latest version from source on GitHub. The annual thingy covers my support - if you need me to implement your suggestions or answer questions :)

Matej
I was considering to buy Boss for a long time now, and I must say, it does NOT disappoint. The GUI is a breath of fresh air for those server owners who are used to editing configuration files, and it is 100% worth my money.
What I wish would be added in the GUI is 1.12 pathfinder support. It's kind of sad that I wanted to make a very pissed off KFC chicken that attacks players, but that does not exist as of now (as to my knowledge)
kangarko
kangarko
Thank you! We do have some Citizens support for this older version but unfortunately the APIs weren't added until much later, and I preferred not to use NMS for stability concerns
This license was given for free. What's this?
Excellent boss plugin! Using it for 2 years now. I've integrated over 50 bosses on my server so far and there are more to come! I appreciate the support and new updates to this resource. Kangarko you are the G!
kangarko
kangarko
Wow! Thanks for using Boss for 2 years! Thank you for the review, and also a big shoutout to our amazing dev Pedro for pushing some amazing updates recently!
Honestly, it's a very good plugin, very intuitive, ergonomic, well-coded, and pleasant to use, whether for configurations (via the native GUI or .yml files).
- attributes

- mob drop

- commands (spawn, death, skills)

- +1 for the natural spawn configuration, which works perfectly (including on MOHIST!!!!, because yes, bosses work just as well on the hybrid forge + spigot versions).

(Unless I'm mistaken, the beta that adds Model Engine integration works 50% (normal, you'd say :') it's a beta.)

Let me explain: the mobs you create can have a texture and a 3D bbmodel (basic animations like walking, head movement, spawn animation, death BUT! For anything related to attack animations or "skills" (like a golem hitting the ground with a shockwave), for the moment it doesn't work; it's the vanilla mob that is "below" the 3D model that will perform its vanilla attacks.

Hoping this can inform future buyers.

PS: I was planning to file a ticket on Github to get more information on whether this was normal, a bug, or in development.)

Congratulations and good luck to the developer, you're really doing a great job.
kangarko
kangarko
Thank you! As for the Model Engine integration. please open a ticket on GitHub so we can fix it asap!
Great plugin with everything you need. Plus, @devpedrobarbosa is always attentive to fixing bugs or adding new features upon request.
kangarko
kangarko
Super happy to hear!
Good plugin, but could we have a bossbar support? Would be cool to display customizeable bossbars for each boss, and they'd appear in certain radiuses etc etc
kangarko
kangarko
Thank you, such a great suggestion! Please open a ticket on GitHub and let me know exactly what you want to display on the bossbar, which placeholders, how it should work and I will have a look!
Excellent plugin by a brilliant developer. Been using this plugin to make a PvE Arena and a Christmas Mob for my server so far and it is excellent. Really well put together and really responsive dev if you do have an issue which is extremely rare as the releases are clearly well developed and tested beforehand.
I requested Lands integration so that mobs can respect Lands claim flag and the Dev accepted the request and added it within a few days.
This is 1 of 4 plugins I own now from this developer and I can say they are all consistently high quality and feature rich.
kangarko
kangarko
Thank you for the review and glad you enjoyed the new Lands support! :)
Latest version does not work on 1.8.8 especially u cant even open the gui.
And idk on older version of this plugin u can not set boss damage.. everytime i try to use this plugin i find some weird problems :D
kangarko
kangarko
Hello! I have fixed it for your fork. Keep in mind it's very difficult to test on all 1.8.8 forks. We've fixed it! Let us know if you have any more issues by opening a ticket on GitHub .
Buy a license now
$19.97
EULA
Standard EULA
Use on any projects you own with attribution
Support
Standard
Includes:
Download the resource
Access new updates
Support from the creator
Support duration
Lifetime
Extras
4X Advanced Entities Pack
+ $9.99
Share and earn
Refer this resource and earn a 10% commission.
109,147 Views
775 Purchases
1,281 Downloads
Oct 20, 2021 Published
Jun 11, 2026 Updated
5.00 star(s)
Average rating (53)
2.2 MB File size
Open source
  1. No
DRM-free
  1. Yes
Unobfuscated
  1. Yes
Type
  1. Gameplay
  1. Monetization
  1. Minigame
Game mode
  1. Survival
  1. Creative
  1. Minigame
Supported software
  1. Bukkit
  1. Spigot
  1. Paper
Supported versions
  1. 1.21
  1. 1.20
  1. 1.19
  1. 1.18
  1. 1.15
  1. 1.14
  1. 1.13
  1. 1.12
  1. 1.11
  1. 1.10
  1. 1.9
  1. 1.8
Supported languages
  1. English
Creators
Owner
Struggling to cover the costs of your server? Set up your own webstore with Tebex in under 30 seconds.
Host a lag-free Minecraft or Hytale server in minutes.
Get 25% off your first order with our link
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Share and earn
Refer this resource and earn a 10% commission.
109,147 Views
775 Purchases
1,281 Downloads
Oct 20, 2021 Published
Jun 11, 2026 Updated
5.00 star(s)
Average rating (53)
2.2 MB File size
Open source
  1. No
DRM-free
  1. Yes
Unobfuscated
  1. Yes
Type
  1. Gameplay
  1. Monetization
  1. Minigame
Game mode
  1. Survival
  1. Creative
  1. Minigame
Supported software
  1. Bukkit
  1. Spigot
  1. Paper
Supported versions
  1. 1.21
  1. 1.20
  1. 1.19
  1. 1.18
  1. 1.15
  1. 1.14
  1. 1.13
  1. 1.12
  1. 1.11
  1. 1.10
  1. 1.9
  1. 1.8
Supported languages
  1. English
Creators
Owner
Struggling to cover the costs of your server? Set up your own webstore with Tebex in under 30 seconds.
Host a lag-free Minecraft or Hytale server in minutes.
Get 25% off your first order with our link
Recommended for you
The ultimate chat formatting, filtering & anti-spam. Can replace 200+ plugins. Folia supported.
5.00 star(s) 128 ratings
2,250 purchases
An addon for ChatControl to allow cross-network features and player messages.
5.00 star(s) 6 ratings
464 purchases
Procedurally destroyable arenas with classes, tier system & Velocity support.
4.50 star(s) 8 ratings
171 purchases
Protect your economy against raids, duplicated items or zero-day exploits.
4.00 star(s) 7 ratings
144 purchases
Add snow particles & terrain snow, spawn snowmen, place gift chests and much more!
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138 purchases
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