Rust Spikes and Mutants?

When will add approximately spikes and mutants?
Without this rust crude :frowning:

+1.
Mutant in rust could be funny.

I prefer something like this https://trello.com/c/UeKeLkAa instead of mutants.
I like to see more postapocalyptic monuments, and some kind of technic from the past, which have old and almost dead batteries, they still programmed to protect something, that probably even doesn’t exist already…

I need my spike walls back. Expensive to make, degrade at a fast rate, highly effective.