Sometimes it's hard to get enough Feedback, so I decided to ask here instead.
I have got a metroidvania assetpack series running for 6 years. I decided to update my existing packs and create 10 new addons and match all together.

The Feedback on whats wanted was only from a few users, same on social media (X is dead I guess..).
What kind of biomes / things are missing? I mean in general: It's a 2D metroidvania pack so... I can't change perspective or something like that. It's more about: Biomes, Ideas you have but you can't get assets for to mockup your ideas.

I would love to hear about that. 
If you need to have a look at the base pack, here: https://samvieten.itch.io/2d-metroidvania-soulslike-pixelart-tileset-with-charac...

I can only find this: Multiple biomes (rock, earth, grass, infected, temple, and much more) in the description so I couldn't tell which biomes you already have and which you haven't. I'm not even sure what infected even mean or look like.

So I'm just going to throw ideas here :

- Bones. Not just skulls, but bones everywhere from floor, wall to ceiling.

- Crystal. Small and large crystals everywhere.

- Coral. Floor, wall and ceiling are made of corals.

- Wood or Tree. Floor, wall and ceiling are made of tree branches.

- Bee Nest. The inside of bee's nest.

- Organic. The inside of giant beast's body.