One of the brave souls that decided to live within the spikes themselves. While natural caves and caverns can be great places to live, they are limited in their size. That's where the carvers come in. Individuals with great determination and very few marbles. Wielding a large pickaxe in one hand and the highly unstable Blastrock charge in the other. One has to be incredibly brave or batshit crazy to handle Blastrock.
Trusty axe
You are proficient with the War Pick.
Boombox Mastery
You know how to make a Blastrock bag. You can learn to make devices out of Blastrock. In your hands blastrock stability rolls are succeeded with rolls over 2.
Blastrock bag
A small cloth bag with small chunks of blastrock in it. Functions as a one time use thrown weapon with 20/60 range. When thrown the user makes a stability roll, if the roll is less then 11 then it is considered a fail. On a failure the bag explodes in the hands of the thrower and deals 3d6 fire damage to the user and half the damage to all adjacent creatures. On a hit the target and all adjacent creatures have to make a Dexterity saving throw or suffer 3d6 Fire damage. On a save the damage is halved.