The metal the Dwarfs call gromril is the toughest and sturdiest in the known world, able to turn aside any blow. Armour forged of gromril is highly coveted for its protective value and full suits of gromril armour are treasured and valued heirlooms.
Source: Warhammer: The Old World Online Rules Index
Gromril ArmourURL Copied!
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A model with this special rule may re-roll any roll of a natural 1 made when making an Armour Save roll.