So, I was thinking about a hardcore mode for stonehearth then I thought, "Why just make it one endless mode of horror? And thus I remembered a favorite mod of minecraft; the Blood Moon mod.
So, I was thinking that every 30th/31st night, the sky turns red as the Blood Moon rises. The undead spawn in a much larger mass and the player must decide whether to lock up his/her villagers in a safe place or attempt to fight the undead hoard.
So yeah, this woukd be a cool thing to have, especially since it’d make the undead a bigger threat.