The addon also includes the mobs coming to 1.17
The warden is a mob that reacts to sound and is blind. This mob’s spawn rate has not been worked on yet, but with version 3 adding the deep dark, it will spawn correctly. The warden will vibrate when it hears a sound so you know to be careful.
Snowballs and arrows (and other projectiles) will distract the warden so pack up before fighting!
Goats have also been added along with powder snow and mountain generation. Goats will charge at you to try and knock you of the mountains and may drop a goat horn when dying, which you can interact with to make the raid sound!
The mountain generation was made by Consome. I asked if I can use it and he/she said I could.