Describe the bug
A clear and concise description of what the bug is.

The mod takes up a lot of the server thread, shown in https://spark.lucko.me/FIwS7wmgGS

To Reproduce
Steps to reproduce the behavior:

1. Install Artifacts on modpack/server
2. Run Spark profiler
3. See that it takes up a lot of the server thread
   
   

Game Environment
Please provide details about the game environment, either by crash report/logs or by detailing it below. Try to reproduce the issue without irrelevant mods first. Otherwise, include a complete list of mods or the name and version of the modpack you're using.

• Artifacts (v12.0.5)
• Neoforge (v21.1.90)
• Modding Magic III-CF (2).zip (zip file with modlist)

Artifacts is still laggy (tested on single-player world and results would possibly be worse on multiplayer)
Possible suspects are Flame Pendant and Obsidian Skull.

I second this

Yep me too.

Apologies for not getting to this sooner, I've been taking a break from modding for the past couple of months. Update 12.1.0 should fix this issue.
If you're still having problems after updating, or if you're experiencing this issue on a Minecraft version other than 1.21.1, please don't hesitate to open a new issue.