Dwarven god of steel and alloys.

A statue of Grond resides in the Sacred Caverns of the Insectoid Hive.

Presenting worn tools and a dash of blue ichor to the god's likeness results in their restoration;

You present your mining tools on Grond’s offering table rub a drop of blue ichor onto the handle of your pickaxe. The pickaxe vibrates on the altar, before dropping to the floor. When you retrieve it, you notice that the worn wood of the handle has been restored. - The Hive (GS-ADV3)