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Mole people
Golems that can't die except by the use of mining equipment or by dwarves which drains their energy while wielded by an enemy, the weakness has an extreme magnetic feeling that feels like you want to limp or avoid pressure when you move.

Depending on how willing you are as a mole person to remove or extract the pick axe from it's wielder the greater the limp magnetic feelings you have and other weakening effects.

They can shift from their own bodily crystals a material that's flexible enough to themselves but not to outsiders which are stealthed and unusable to nations outside of their own natural race. The weapons do not work or seem to have any features but appear to have them when used by the mole people which can shape from their own materials and sciences from their own natural reach. They can also appear dead when shattered but only through using a pick axe may they be permanently killed turning into a stone that's unusable to anyone except through throwing. If shattered to pieces then their by any kind of pickaxe they will be unable to live unless parts of them which are stored elsewhere are forming to stay alive. They heal from the use of any non-pickaxe crystals. Materials mined by miners that had used a pickaxe, they would request that they use some other tool when they mine otherwise it would have less value to them but it doesn't affect them.


Mole people Subterror form
All mole people have the ability to transform into an energy form that absorbs all materials and excluding magic and elementals and ignore all hitting materials. Their natural abilities are amplified but their weakness changes from pickaxe to certain elements that are all unrelated to matters and arcanes but with the use of really powerful dark chi or energy.