The Yeti mod (originally created by Flamc04) for Version 1.20.1. He only spawns in cold Biomes like the snowy taiga or snowy plains and has the same AI and beahaviour as the evolved cave dweller. You should use the configured mod by Mr.Crayfish while ingame or use the yeti-server.toml while not ingame to configure the mod.
The Yeti (Dweller) Team
