The redesigned Terrodrenal. If you couldn't tell, its meant to look like a butterfly from above. 

here's the basic rundown: It's a creepy psychopath creature that looks like a harmless butterfly with a death weapon tail and an unholy jaw that unhinges to swallow you whole by gliding down, yoinking them with their back feet, stabbing you with the nuclear weapon, and then landing with their front feet and proceed to swallow you to death of the black abyss.

I think I summed up this abomination perfectly.