Underground enemy, and gem drops in the crucible

Firs part is pretty straight forward, I don’t know the name of the underground giant enemy that erupts out of the ground and grabs you, but the damage of the grab attack needs to be heavily adjusted. I’m level 30, with 25 into health and 800 armor and it still ones shots me. It was cool and a jump scare the first time, but when I’m just looking for gems (of which the drop rate is abysmal) getting one-shot and being returned to town is anti-fun. It’s just a waste of time.

Why aren’t gems dropping in the crucible? It’s the hardest content in the game, in makes sense that I can get them there, and not just at the end. Seems like an oversight. They’re one of the strongest ways to influence a build and its actually boring how little their drop rate is. I’ve never even SEEN a bloodstone in my 40 hours of game time.

Based on one bounty they are called Torn crawlers. And same experience here, already made a topic on them. Torn crawlers are annoying
Please upvote the topic so that it gets more attention. Thanks.