Durest’s Adamantine Transformation

A traditionally dwarven spell, it allows the caster to temporarily transmute metals into higher metals.

When you cast this spell you can choose up to eight metallic items; each of these items is considered to be made from adamantine for the duration. Weapons gain an additional +1 to attack and damage rolls and armor gains an additional +1 AC. Adamantine weapons automatically critically hit against objects; adamantine armor prevents the wearer from suffering critical hits.