Fabric and NeoForge jars do not run as they are: their code calls and patches Minecraft's Java classes, and Horizon has none. What carries over is the data and assets inside a jar (modpacks.md). Mods ...

A free, dupe-safe auction house for Paper and Folia 1.20.1–26.3 with Buy It Now, real bids, sale alerts, price insight and a cross-server market.