Deepening Elemental Bond: Metal

Your elemental companion grows stronger, and the bond you have formed deepens, further advancing your martial prowess.

• Metal armour is as a second skin for you. You gain proficiency with armour types made primarily of metal.
• Improved Investiture of Iron: You are now able to invest more power into your metal melee weapons. When you use your Investiture of Iron ability, the target weapon now gains a +2 bonus to attack and damage rolls you make with it. Alternatively, you may target two separate weapons, imbuing each with a +1 bonus to attack and damage rolls.
• Expanded Innate Spellcasting: You learn one of the following spells and may cast it once for free as if using a 2nd level spell slot, regaining the use when you complete a long rest:  bane, heroism, hunter's mark, shield of faith, alter self, enhance ability, heat metal, hold person, warding bond. Charisma is your spellcasting ability for this spell. You may swap this spell for a different one from the same list when you gain a level.

If you select the spell magic stone, you may only cast the spell on metal objects or rocks with a high metal component, such as ball bearings or shards of meteorite.
If you select the spell mending, you may only cast the spell upon metal objects, or you may use metal as a material with which to affect repairs, such as in kintsugi.
If you select the spell shield of faith, the protection is provided by your elemental spirit, and the shimmering field appears to shine with a gold, silver, or copper sheen. When you cast this spell on yourself, the spell has a duration of up to 1 hour. When you cast the spell on a creature other than yourself, the spell ends if the target creature is further than 60 feet from you.
If you select the spell alter self, you may only use the natural weapons part of the spell. When cast in this way, your natural weapons deal an extra 1d4 damage.
If you select the spell enhance ability, you may only use features related to physical traits (bear's endurance, bull's strength, and cat's grace). When you cast this spell on a creature other than yourself, the spell ends if the target creature is further than 60 feet from you.
If you select the spell hold person, the spell manifests as ethereal shackles and chains wrapping around the target.