Ultris: Boss Expansion
ModTake on new bosses and discover their lairs across your world.
- Security
- Passed
- Privacy
- None found
- Runs on
- Server only
- Loaders
- Fabric, Forge, Quilt
- Minecraft versions
- Up to 1.20.1
Why gradeD
How grades workStrengths
Points lost
- No release in 2.9 years−16 points
- No source code link−7 points
- Many modpacks removed it−4 points
- No public issue tracker−3 points
All 11 criteria
Maintenance
12 points lost15 / 27Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.2.9 years ago (19 Nov 2023). 53 modpacks released in the last 6 months still include it, so it keeps 51% of these points. 6 / 12Supports popular versionsWhether the project has a file for a Minecraft version that 15% or more of the popular mods updated in the last 6 months also support. A version many modpacks use, like 1.20.1 or 1.21.1, also counts after a release in the last 12 months.1.20.1 on Fabric, Forge and Quilt. 34% of the 718 popular Fabric mods updated in the last 6 months also have files for 1.20.1. Latest Minecraft: 26.3. 9 / 9Regular releasesIn how many of the last 24 months a new file came out. Full points at 8 months.No release in the last 24 months 0 / 6Stability
4 points lost11 / 15Removed from modpacksHow many modpacks removed it in a later version of the pack. We can only see this in modpacks with two or more versions. A pack that swaps it for another edition of the same project, or that is rebuilt from scratch, does not count.73 of the 348 modpacks with two or more versions removed it in a later one (21%) See the 73 modpacks6 / 10Quick fixesHow often a release needed a quick fix: a new release within 3 days to fix a problem in it.Not measured yet.Known conflictsHow many projects say they do not work with it, compared with how widely it is used. Packs, small projects, forks, ports, add-ons, alternatives and old versions do not count.None 5 / 5Transparency
10 points lost0 / 10Source codeWhether the project page links to its source code, so anyone can read what it does.No link on the project page 0 / 7Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.No link to report problems 0 / 3Popularity
Full points4 / 4DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.3,322,235 4 / 4Track record
4 points lost4 / 8AgeHow long the project has existed. It counts less when no new file came out recently.4.4 years, 60 releases 4 / 8Security
PassedFile checksThis check adds no points. It can only take points away.Our checks found nothing harmful in the latest file for recent Minecraft versions. See Security
34.4 of the 64 points that apply = 54 out of 100. The points above are rounded to whole numbers.
Images
About
Ultris: Boss Expansion adds eight vanilla-fitting bosses, each with its own encounter, alongside quests, rewards, new structures, items, and foes. The bosses are the Corrupted Enderman, Blaze King, Ultra Wither, Sanctum Keeper, Giant, Phantom Swarm, Illusioner, and Shulker Stone. Their encounters span different parts of the world: the Corrupted Enderman may appear in the Overworld, the Blaze King waits atop a tower within Nether fortresses, the Sanctum Keeper guards an underground dungeon, and the Shulker Stone lies within an inverted pyramid above End cities. The fights feature distinct behaviors, including the Corrupted Enderman phasing through walls and teleporting before launching aerial orb attacks, the Blaze King remaining stationary while progressing through phases, and the Ultra Wither dashing, exploding, and summoning lasers. Other encounters pit players against the Giant’s troop zombies and block-breaking shockwaves, the Illusioner’s copies and damaging books, or the Shulker Stone’s spinning projectiles that can deflect shots. Exploration and progression connect these battles: players can find the Sanctum with an Ominous Pearl forged with blaze powder, while the same pearl can be forged with a gold block and dropped onto an active Wither to create the Ultra Wither. The Sanctum is a randomly generated underground dungeon with trapped Souls to free, guarded passages, and a throne room where the Sanctum Keeper appears. Boss rewards include distinctive gear such as Giant Stompers that let players damage mobs by jumping on them and perform a charged high jump, and the Spirit Bow, whose shots deal area damage and can split into copies of the Sanctum Keeper. The project is available as either a mod or a datapack, with the same gameplay in both formats.
Written from Modrinth and CurseForge . How we write it
In-game changes
Does not change the game's code directly.
Adds 3 structures, 2 recipes, 38 advancements, 19 loot tables and 6 sounds.
Counted from the names and data files in the mod, so the list may not be complete.
Keeps all of vanilla Minecraft's textures, models and sounds.
Details
- Creator
- limesplatus
- License
- Custom license
- Downloads
- 3.3M
- Created
- 19 Jun 2022
- Official pages
- Modrinth , CurseForge
Security
No harmful code found
We checked its files and read their code, without running it.
Why we show this: a mod runs on your computer like any program, so harmful code in it can take your accounts or files. Our checks look for known signs of harm. They cannot prove that a file is harmless. In the grade: malware means no grade, and a Warning in a latest file for a recent Minecraft version lowers it.
How we checked
- FilesWe download the files from Modrinth or CurseForge and look at what is inside them and what their code can do, without running them. Fixed rules tell what is harmful.4 latest files: the newest file for each Minecraft version and loader. The answer above is about the one for a recent version. Recent versions: those released in the last 2 years, plus 1.20.1 and 1.21.1, among the most played in modpacks. See each file in Releases
- Their codeWe turn the code of the files back into readable code and follow what it does, without running it. This shows what it downloads, what it sends and where your login goes.Read without running it
- Author on ModrinthThe disclosure form on Modrinth, where the author declares that the project reads or edits things on your system outside the game. Since 13 Aug 2026, Modrinth's rules require it when this applies.Nothing declared about your system outside the game.
- Looked for, not foundWe looked for these in the file and did not find them.The internet, folders outside the game, other programs, updating itself, the webcam or microphone, an AI service.
Privacy
We found nothing it sends
We read its code without running it: it contacts no web address while you play.
Why we show this: a mod can send things about you over the internet, like your player name or your login. Contacting an address to check for updates or download files sends nothing about you. Not in the grade: sending data can be normal for what a mod does.
How we checked
- Files readWe read the code without running it. We list each web address the code contacts while you play, and what it sends. Code that is never used is left out.The code of its one file, for recent Minecraft versions. See each file in Releases
- Author on ModrinthThe disclosure form on Modrinth, where the author declares crash reports, usage data and advertisements. Since 13 Aug 2026, Modrinth's rules require it when a project collects data on its users or shows advertisements.Nothing declared about crash reports, usage data or advertisements.
AI
No sign that AI was used to make it
We looked for AI tools in its texts, files, images and sounds and found none.
No sign of AI in the game
We found no AI service, AI library or AI model file in its code.
Why we show this: some players and servers avoid projects made with AI, and AI in the game can send what you write to an online service. Not in the grade: using AI does not tell whether a project works well or is kept up to date.
How we checked
- Author on ModrinthThe disclosure form on Modrinth. Since 13 Aug 2026, Modrinth's rules require it when a substantial part of the code is AI output, when an asset is mainly AI output, or when the project or its page relies on generative AI.No AI content or AI features declared.
- Description and changelogsThe description, project page and newest changelogs: sentences saying an AI tool was used, and text pasted from an AI chat.Nothing found6 of 40 changelogs read
- Its filesFiles that AI coding tools leave behind (like AGENTS.md), and the texts inside the files you download.Nothing found
- Images in its filesHidden data in the images of the files you download, where AI image tools write their name and settings.Nothing found36 images read
- Sounds in its filesThe tags of the sound files in the files you download, where some AI music tools write their name.Nothing found7 sounds read
- Code of the modThe code and files of the mod, read without running it: addresses of AI services, AI libraries, AI model files and a place for your own AI key.No AI service, AI library or AI model file
Compatibility
See all 60 filesPoint at or tap a version to see its loaders.
Related projects
Projects that need Ultris: Boss Expansion to work.
Modpacks using this project
Find modpacks with it| Oct 2024 | 57 |
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| Nov 2024 | 44 |
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| Jan 2025 | 49 |
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Fewer modpacks put it in their new versions than a year ago: 14 a month now, 30 a year agoThe average of the last 6 months, compared with the same 6 months a year before. We say it only when the change is large..
1,071 modpacks include Ultris: Boss Expansion in at least one of their versions. Here are the 30 most downloaded.
Prominence™ II: Hasturian Era15.4M downloadslast version with it 9 Sep 2023
DarkRPG - RPG with Magic, Origins, Quests, Adventure3.9M downloadslast version with it 29 Nov 2024
Fantasy MC Fabric1.9M downloadslast version with it 18 Mar 2024
MineColonies: Dimensional Adventure1.2M downloadslast version with it 23 Jan 2025
OccultCraft615K downloadslast version with it 17 Jul 2022
Arcadia [RPG]326K downloadslast version with it 28 Apr 2025
HyturCraft RPG221K downloadslast version with it 30 Apr 2025
The Everlasting Fog [The Horrors Cave Dweller, Herobrine, & More]218K downloadslast version with it 5 Nov 2023
Planeta Vegetta (Unofficial)169K downloadslast version with it 15 Oct 2025
HORIZONS - Beyond Your Eyes | Unofficial145K downloadslast version with it 26 Nov 2025Often in the same modpacks
Mods that modpacks often add together with Ultris: Boss Expansion. Share: how many of the modpacks with Ultris: Boss Expansion also have that mod.
AttributeFixAModin 57% of the modpacks with Ultris: Boss Expansion
Deeper and DarkerAModin 54% of the modpacks with Ultris: Boss Expansion
Towns and TowersBModin 52% of the modpacks with Ultris: Boss Expansion
TerralithAModin 50% of the modpacks with Ultris: Boss Expansion
YUNG's Better Ocean MonumentsAModin 48% of the modpacks with Ultris: Boss Expansion
YUNG's Better Nether FortressesAModin 48% of the modpacks with Ultris: Boss Expansion
Simply SwordsAModin 46% of the modpacks with Ultris: Boss Expansion
YUNG's Better Desert TemplesAModin 46% of the modpacks with Ultris: Boss Expansion
ChoiceTheorem's Overhauled VillageAModin 45% of the modpacks with Ultris: Boss Expansion
ExplorifyCModin 44% of the modpacks with Ultris: Boss ExpansionLatest files
The newest file for each Minecraft version and loader. The files for recent versions come first. Recent versions: those released in the last 2 years, plus 1.20.1 and 1.21.1, among the most played in modpacks.