Meteor Client 1.21- 1.20.6 -- 1.16.5

It sounds like you're asking about a key across versions of Meteor Client (a popular utility mod for anarchy/utility purposes in Minecraft) — specifically from 1.16.5 up through 1.20.6 and 1.21 .

Meteor Client is version-specific. To match the versions you mentioned, you must download the specific build for your Minecraft instance: Meteor Client 1.21- 1.20.6 -- 1.16.5

He ticked , “Speed” , “Phase” —and walked straight through the obsidian wall into a secret tunnel system. The Watcher didn’t react. No lag. No rubberbanding. It was like the server was blind . It sounds like you're asking about a key

However, note that many major anarchy servers (like 2b2t or 9b9t) yet. Use this version for single-player testing, new servers, or anarchy servers that have updated. The Watcher didn’t react

AutoCrystal is unstable in 1.21 due to combat test changes.