Crystal Rocket Attack
I showed how some of the Crystal enemies work before, but I had a special attack for a single specific crystal monster in mind - the crystal rocket attack:
It works like this:
This enemy, the Quartz Raketa( rocket in Lithuanian), is stationary and keeps spinning with a white indicator in front of it. If you wander into the white indicator, it will turn red to warn you and then you have around a second to gtfo because this enemy will start growing a crystal on it's back side. The crystal then explodes rapidly propelling the whole enemy towards the location you were when it locked on you and explode in a bright white light. It will do some damage and can also break some walls and reduce Cave Stability as well.
Unlike most monsters, this one doesn't notice you behind obstacles, because the indicator you need to avoid is ray casted and is stopped by walls, random debris, other monsters etc. I actually never used ray casting for anything somehow, so it was a nice tool to add to my belt.