Anyone remember that game from Whirled, ya know Underwhirled Drift? Remember how It had 3 charactors: Devilites, Soul Jelly and Pit Brutes? I do. Spiral Knights already has Devilites (as a main enemy in the Fiend Family), and Soul Jelly (as a rare monster in the Slime Family). I suggest Spiral Knights adds the character that they forgot, the Pit Brute. If it ever is implemented, I suggest it be a rare form of Lumbers or a new monster in the Fiend Family.
If Implemented as a new monster in the Fiend Family
On levels with a fiend theme, it should have a good chance of being inside a mineral when you go to break it. Like Normally when you hit mineral, they break. There should be a chance that It doesn't break and a Pit Brute spawns.
Pit Brute Attacks
Fiendish Earthquake- It causes the camera to shake and blur your vision for a few seconds, if you are too close to where it made the earthquake, it will deal damage to you.
Stomp- it should charge at you and stomp on you, causing damage.
Swallow- It should try to pick you up and try to swallow you to satisfy its bottomless stomach. If it is successful at swallowing you, you go into its stomach and take damage and then it spits you out.
But the place it spawns seems odd. I mean Imagine that you're dying and you come across here, then this son of a snipe pops up.
Then the nerfs will come....