spengnstuff-2.1a.jar is a release file of the Minecraft mod Ember's Everything Asylum for NeoForge, Forge, made for Minecraft 1.20.1. It was published on April 5, 2024 and is 30.4 MB in size. For the full description, screenshots and every other version, visit the Ember's Everything Asylum mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.