ModsFinder

XP Synthesiser

by MC_Dart

With XP Synthesiser installed, a player records how much experience a mob farm yields and then turns that recording into XP power on demand.

NeoForgeClient and serverMIT LicenseOpen source1.21.1 – 1.21.4

What it does

XP Synthesiser adds a block and a Kill Recorder item. Once crafted, holding shift and right-clicking starts a recording that tallies experience from mob kills. Toggling the same action again stores the result on the item. Only experience from kills is registered; other sources are ignored. A later recording made with the same Kill Recorder overwrites the earlier one.

A Kill Recorder holding a saved recording is placed inside the XP Synthesiser block. With a valid recording loaded, the block generates experience equal to the amount stored in the recording, and it consumes power for each point it produces. The mod targets multiplayer and singleplayer worlds as a lag-free alternative to mob farms. Generated XP is pulled out through buttons on the block's interface, and it stays inside the block until removed. Breaking the block loses any XP it still holds.

Installation covers the server and each player's game. Files are published for NeoForge across four game versions, 1.21.1 – 1.21.4, with 1.0.2 for 1.21.4 as the latest file. The code is under the MIT License and open source.

Key features

  1. Kill Recorder

    Records experience gained from mob kills after a shift and right-click toggle, then stores the result on the item.

  2. Experience generation

    Generates the amount of XP a recording captured, drawing power while it runs.

  3. Power cost by recording length

    Power is charged per experience point, and shorter recordings cost much more per tick than longer ones.

  4. Paused without power

    Generation stops when the block lacks sufficient power and resumes once power returns.

Compatibility

Latest build for each game version and loader.

1.21.41.0.2
1.21.31.0.2
1.21.21.0.2
1.21.11.0.2
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

Use cases

Singleplayer experience

A player records a mob farm once and draws the stored experience as needed, without keeping the farm running.

Server experience supply

Server owners can use a recorded farm to supply experience on multiplayer worlds with less load than a live farm.

Who it’s for: Players who want experience from a farm without maintaining it, and server owners who want a lower-lag alternative to mob farms on multiplayer servers.

Questions

Does XP Synthesiser have to be installed on the server?

Yes. The mod is client and server, so the server and every player need it.

Which loader and versions does XP Synthesiser support?

It is published for NeoForge only, with files for 1.21.1 – 1.21.4.

What happens to experience inside the block when it is broken?

Breaking the XP Synthesiser block loses any XP it still retains.

Does a new recording replace the old one?

Yes. A later recording made with the same Kill Recorder overwrites the previous one.

In the catalog

XP Synthesiser is one of 11,058 Mobs mods on ModsFinder, and one of 4,974 Mobs mods for NeoForge. 17,979 mods support Minecraft 1.21.4.

Mobs mods11,058NeoForge modsMods for 1.21.417,979

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What the author says

The mod contains a block (the XP Synthesiser) and an item (the Kill Recorder). After crafting the Kill Recorder, you can toggle (shift + right click) it to let it start recording any mobs you kill. It will tally the gained experience from the kills, and then you can toggle it again to store that recording. Any future…
MC_Dart, on the Modrinth page

Official listing

Owner
MC_Dart
Published
2024-12-15
Updated on Modrinth
2025-03-05
Facts verified
2026-10-15

Tags

Game mechanicsMobsUtility
Open on ModrinthCompare