Pardon me while I roll my eyes at yet another creeper like derivative. Vintage Story does NOT need something creeper-like. Howz about reading some Lovecraft and developing a creature with destructive capabilities based on the source of inspiration for this game?
What if a meteor crashes into the ground (creating a crater) and from the suevite emerges a critter that fades in and out of the world but creates high negative temporal stability within say 100 blocks of it's location? Now to be less creative lets make this a tall black critter with purple eyes that picks up a single block, shall we? HELL NO! Instead, let's make this critter degrade the soil fertility within the temporally instable area it creates? Soil goes from Terra Preta to high fertility soil to medium fertility, low fertility and finally barren. Maybe it then changes into sand as the final stage? What does it look like? How about a nebulous, pulsating ellipsoid of shimmering color?
All of those are characteristics drawn directly from Lovecrafts stories.