It's the big boomer!

The Bulk Detonator is like a huge version of the Glyphid Exploder. It is one of, if not the biggest creature found in the cave system. Its entire body is gnarled into a lumpy mess and its mouth is deformed, with many fangs jutting out in random directions.

It is well protected, can cause serious damage with its deadly stomp, but it is most devastating when it dies as it blows up itself and most of the cave it is in!