Idea Prompt 68: Lost in Spirits:

 A strange monster has appeared in Hermitcraft season 6-7 (people are still moving and everything is getting set up). This monster steals people's souls from their bodies and locks them within small crystals that it chooses to eat later. A few people (Mighty, Impulse, and a few others) manage to escape from the crystals.

 Impulse and Mighty manage to find one of the three hermits able to see spirits and seek help while being hunted down by the monster. 

That's it. That's all I got for this idea. It's based on a dream.