You can increase one of your ability scores by 2 and another ability score by 1.

Your body is made of a unique liquid metal, granting you natural armor. When you are not wearing armor, your AC equals 14 + your Dexterity modifier. You can still gain the benefits of shields.

When you complete a long rest, choose one of the following metal types, gaining a unique trait for the next 24 hours:

• Mercury (Speedy & Toxic): Your speed increases by 10 feet, and your unarmed strikes deal poison damage instead of their normal damage type.
• Silver (Holy Metal): Your unarmed strikes count as magical for overcoming resistances, and you gain resistance to necrotic damage.
• Iron (Resilient & Heavy): You gain advantage on saving throws against being knocked prone or moved against your will.
• Cold Steel (Anti-Magic Alloy): You have advantage on saving throws against spells and other magical effects.

Your arms can reshape into natural weapons. You can use your unarmed strike to deal 1d8 slashing or bludgeoning damage, and it is considered a finesse weapon.