
Modrinth · Minecraft mod
Cool Functions
Add fun, powerful, and useful features to your Minecraft world like Jetpacks or an Ender Bow — all packed into one datapack!
Quick answer
Which Cool Functions release matches 26.1.2 Forge?
Cool Functions v1.5.4+mod targets 1.21.6, 1.21.7, 1.21.8 with Fabric, Forge, NeoForge. Installation on the client is optional. Installation on the dedicated server is optional. No extra mods listed for this file.
Where it goes
Is Cool Functions required on the client, server, or both?
Installation on the client is optional. Installation on the dedicated server is optional.
The source marks this as usable on both the client and server.
What else does Cool Functions v1.5.4+mod need?
v1.5.4+mod on 26.1.2 Forge. Every mod below is checked against that same setup.
This file does not list any required mods. Do not add a library just because a different file uses it.
This file does not list any required or optional mods.
Before you install it
Add Cool Functions without breaking your instance.
Built for Cool Functions v1.5.4+mod on 26.1.2 Forge. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use v1.5.4+mod. It targets 1.21.6, 1.21.7, 1.21.8 with Fabric, Forge, NeoForge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
This file does not list any required mods. Do not add a library just because a different file uses it.
- 03
Put it on the correct side
Installation on the client is optional. Installation on the dedicated server is optional.
- 04
Pick the file you checked
Use the “Get this file” button beside v1.5.4+mod. It opens that exact file at the source.
About this project
What does Cool Functions add?
Cool Functions
Add fun, powerful, and useful features to your Minecraft world — all packed into one datapack!
📖 Description
CoolFunctions is a Minecraft Data Pack that adds several fun mechanics and useful functions to the game, including:
- 🏹 Ender Bow — A custom bow that allows you to teleport to your arrows
- 🚀 Jet Packs — Five tiers of Jet Packs with increasing fuel capacity, speed, and altitude
- 👤 Morph System (experimental) — Transform into different mobs
- 👻 Ghost Blocks — Place phase-through blocks
- 🧹 Utility Functions — Useful utilities such as ClearLag or give (only for administrators)
📢 Content & Usage Notice
You are free to use this datapack in videos, streams, or showcases, as long as you clearly credit me (for example in the description).
⚠️ Reuploading or redistributing this datapack without permission is not allowed.
Project is licensed under the MIT License
🏹 Ender Bow
📦 Obtaining
Option 1 - Crafting table:

Option 2 - Drop Crafting:
Drop the following items on the ground:
- 1 Bow
- 4 Ender Pearls
The Ender Bow recipe will also automatically unlock when you obtain the required materials.
🎯 Usage
- Hold right-click, just like a normal bow.
- You'll follow the arrow until it lands.
🚀 Jet Packs
The Jet Pack comes in five tiers, each providing increased fuel capacity, speed, and maximum altitude.
Each tier also has its own custom color, making it easy to distinguish between them.
💡 The altitude limit is measured as the height above the ground directly below the player(*). Once the maximum altitude is reached, the Jet Pack will no longer provide upward thrust and you will hover around the max altitude.
*Leaves are not counted as ground.
Tier 1
- ⛽ Fuel: 1 minute
- ⚡ Speed: Low
- 📏 Maximum altitude: 15 blocks above ground
Craft:

Tier 2
- ⛽ Fuel: 15 minutes
- ⚡ Speed: Medium-low
- 📏 Maximum altitude: 30 blocks above ground
Craft:

Tier 3
- ⛽ Fuel: 30 minutes
- ⚡ Speed: Medium
- 📏 Maximum altitude: 40 blocks above ground
Craft:

Tier 4
- ⛽ Fuel: 45 minutes
- ⚡ Speed: Medium-high
- 📏 Maximum altitude: 70 blocks above ground
Craft:

Tier 5
- ⛽ Fuel: 1 hour
- ⚡ Speed: High
- 📏 Maximum altitude: 100 blocks above ground
Craft:

Recipe Update: The Tier 5 Jet Pack recipe now requires 3 Dragon's Breath.
Creative Jet Pack
A special Jet Pack intended for creative use.
- ⛽ Fuel: Infinite
- ⚡ Speed: Very high
- 📏 Altitude: Unlimited
Give:
/function coolfunctions:give/jetpack
🕹️ Usage
- Equip the Jet Pack in your chestplate slot.
- Sneak to activate it.
- Stop sneaking to descend with Slow Falling.
Tip: if Slow Falling is too slow for you, consider switching to your normal chestplate to descend faster and switch back just before hitting the ground (-> no fall damage, but normal fall speed!)
👤 Morph System
⚠️ Experimental: The Morph System is still experimental and may not work perfectly with every mob (especially big mobs like the Iron Golem).
🪄 Morph into a Mob
/function coolfunctions:morph/<MobName>
Replace <MobName> with the name of the mob you want to morph into.
🔙 Unmorph
/function coolfunctions:unmorph
👻 Ghost Blocks
Ghost Blocks appear as normal blocks, but you can phase through them.
📦 Obtaining
/function coolfunctions:ghostblocks/<BlockName>
Replace <BlockName> with the block you want to get the Ghost Block spawn egg for.
🧱 Usage
Just spawn it wherever you want
🗑️ Removal
Remove one Ghost Block (the nearest one):
/function coolfunctions:ghostblocks/remove
Remove all Ghost Blocks in a 10×10×10 area:
/function coolfunctions:ghostblocks/removemr
Remove all Ghost Blocks in the world(*):
/function coolfunctions:ghostblocks/ra
*In all the loaded chunks of the world
⚙️ Utility Functions
Cool Functions also provides various utility functions that can be accessed directly through Minecraft's /function command.
🧹 ClearLag
ClearLag allows you to manually remove dropped items from the world. This can help performance when there's a lot of items on the ground.
🗑️ Clear All Ground Items
/function coolfunctions:clearlag
This removes dropped item entities from the world(*).
*In all the loaded chunks of the world
💎 Give Functions
Give an Ender Bow:
/function coolfunctions:give/enderbow
Give a Creative Jet Pack:
/function coolfunctions:give/jetpack
💡 The give functions have been organized under
coolfunctions:give/to make them easier to find and use.
📜 Credits & Usage
Project is licensed under the MIT license
Cool Functions is created by mattmunich.
You are welcome to showcase and use this datapack in your videos, streams, and other Minecraft content, but you have to make sure proper credit is given.
⚠️ Do not reupload or redistribute the datapack without permission.
Project description from Modrinth.
Pick your setup
Cool Functions by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
26.3-snapshot-10
5 loader builds26.3-snapshot-9
5 loader builds26.3-snapshot-8
5 loader builds26.3-snapshot-7
5 loader builds26.3-snapshot-6
5 loader builds26.3-snapshot-5
5 loader builds26.3-snapshot-4
5 loader builds26.3-snapshot-3
5 loader builds26.3-snapshot-2
5 loader builds26.3-snapshot-1
5 loader builds26.3-rc-2
5 loader buildsShowing the newest 12 of 65 game versions. Older files are in the list below.
Check the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Cool Functions versions and loaders
v1.5.4+mod
coolfunctions-v1.5.4.jar
12 Sept 2026
v1.5.3+mod
coolfunctions-v1.5.3.jar
17 Aug 2026
Looking for an older file? The official Modrinth project page is in Resources.