Zero Delay Crystals
by JackyMaki
Zero Delay Crystals is a Fabric mod by JackyMaki that cuts the wait before end crystal placement and crystal breaking is sent from the client.
What it does
Normally the client waits a short interval before end crystal placement and crystal breaking are sent, and this mod drops that wait so each crystal interaction registers right away and feels more immediate. The change is limited to the client; the code applies only to placing and attacking end crystals.
Because the change is client-side, a server still applies its own rules, latency checks, anti-cheat logic and tick timing, so it can reject an action it considers invalid. The author suggests single-player or private testing servers where client-side timing changes are allowed. The mod is intentionally simple and adds no automation, visuals, menus or combat modules of its own.
Zero Delay Crystals is published for Fabric only, across 11 release versions in 1.21.1 – 1.21.11. The latest file is 1.0.5 for 1.21.11, released 2026-07-30. Only the client needs it, and the MIT License covers the code, although the project is not open source.
Key features
Immediate crystal placement
End crystal placement is sent without the default client-side delay, so a crystal appears as soon as it is placed.
Instant crystal breaking
Attacking an existing end crystal is not held back by the client delay, which shortens the gap between hits.
Narrow scope
Only end crystal placement and breaking are changed, and no other gameplay systems are altered.
No extra features
The mod adds no automation, visuals, menus or combat modules, keeping the change small.
Compatibility
Latest build for each game version and loader.
1.21.x11 of 11 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Who it’s for: Players and server owners who work with end crystal timing on Fabric, mainly in single-player or private testing setups where client-side timing changes are allowed.
How it compares
Crystal Optimizer by Flecky is a Fabric client-side mod released under the MIT License, with files for 1.21.4 – 1.21.11, and it is not open source. Ryuu Crystal Optimizer is also client-side only, covers 1.21 – 1.21.11 and is licensed under the Apache License 2.0. NoCrystalPVP is a different kind of mod: it is a server-side mod released under All rights reserved, with a single file for 1.21.11.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Zero Delay Crystals | Fabric | 1.21.1 – 1.21.11 | Client-side only | 2026-07-30 |
| Crystal Optimizer | Fabric | 1.21.4 – 1.21.11 | Client-side only | 2026-09-01 |
| Ryuu Crystal Optimizer | Fabric | 1.21 – 1.21.11 | Client-side only | 2026-08-30 |
| NoCrystalPVP | Fabric | 1.21.11 | Server-side only | 2026-04-09 |
Questions
Does Zero Delay Crystals need Fabric API?
Does a server need Zero Delay Crystals installed?
Which game versions does Zero Delay Crystals support?
In the catalog
Zero Delay Crystals is one of 29,952 Game mechanics mods on ModsFinder, and one of 19,630 Game mechanics mods for Fabric. 19,862 mods support Minecraft 1.21.11.
More from JackyMaki
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What the author says
Crystals Optimized is a lightweight Fabric client-side mod for Minecraft 1.21.1 focused only on end crystal responsiveness. It removes the normal client-side delay when placing end crystals and when attacking existing end crystals, making crystal interactions feel faster and more immediate. This mod does not add…
Official listing
- Modrinth page
- modrinth.com/mod/zerodelaycrystals
- Owner
- JackyMaki
- Published
- 2026-07-30
- Updated on Modrinth
- 2026-07-30
- Facts verified
- 2026-10-15