Masks have the greatest influence on your characters' stats. Each mask has a special skill associated with it when it is created. You can re-roll a mask if you do not get the skill you were hoping for. You can fuse two masks together to try to create a more powerful mask. Yorniq the dwarf has the Primal Anvil mask when first starting. This mask has the God's Hand skill, which is a 30% heal. It is very useful during the early part of the game. Fuse it with other masks to increase the effect of its healing.