seidr-1.0.jar is a release file of the Minecraft mod Seidr - Simple Magic based on Norse Mythology for NeoForge, made for Minecraft 1.21. It was published on August 6, 2024 and is 0.5 MB in size. For the full description, screenshots and every other version, visit the Seidr - Simple Magic based on Norse Mythology mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.