Zalto's Forge Apron

Require attunement
This apron shrinks to the size appropriate for the
user. While attuned and wearing this apron, you
gain resistance to fire damage. In addition, you
gain proficiency in smithing tools. If you are
already proficient in smithing tools, your
proficiency bonus is doubled.
When forging, you can now manipulate stones as
if it were the consistency of metal.