You can speak telepathically with a number creatures equal to your proficiency bonus within 30 feet, without any method for the creature to respond, and your telepathy is in a language you know.

You know the Mage Hand cantrip, and the hand is invisible when you cast the cantrip with this trait.  Starting at 3rd level, you can cast Shield once with this trait and regain use of it after completing a long rest.  Starting at 5th level, you can cast Enlarge/Reduce once with this trait and regain use of it after completing a long rest.

You have proficiency with Arcana and History.  You have Expertise on History checks involving Psionics.

You have advantage on saving throws against Poison.  You have resistance to Acid, Poison, and Psychic damage.

Choose Two Additional Normal Languages, and One Exotic Language you know.

You can finish a long rest in 4 hours if you spend those hours in a trancelike meditation, during which you retain consciousness.  You are immune the paralyzed condition.  

You have advantage on saving throw to resist or end Enchantment spells, Charmed condition, Frightened condition.

You have proficiency with the Handaxe, Battle Axe, and Greataxe.  You also have proficiency with light/medium armor, and shields.

Whenever you make an Intelligence (History) check related to the origin of metalwork or items made mostly of metal, you are considered proficient in the History skill and add double your proficiency bonus to the check, instead of your normal proficiency bonus.  You have advantage on skill checks to determine the value or authenticity of items or object made mostly of metal.  

Iron Dwarves are naturally thick skinned, and hard to kill, in addition to the legendary dwarven poison resistance.  You have advantage on saving throws against poison, and you have resistance against poison damage  You also have resistance to Piercing damage.  Whenever you make your first Death Save, you have advantage on the roll.  Once you use this trait, you must complete a long rest before using it again.

Iron dwarves are naturally inclined to metalworking and smithing.  You have proficiency with Smith's Tools, and add your proficiency bonus an additional time when using them.  As a Reaction to taking being hit with an attack that deals Fire Damage, you gain Resistance to Fire damage for 1 minute.  You can use this Reaction one time with this trait and regain use of it upon finishing a Short Rest.

You know the Spare the Dying cantrip.  When you reach 3rd level, you can cast the False Life spell once with this trait and regain the ability to do so when you finish a long rest. When you reach 5th level, you can cast the Warding Wind spell once with this trait and regain the ability to do so when you finish a long rest.  These spells do not have any save/attack so there is no need for a spellcasting trait.

You have proficiency in the Survival skill.  You have advantage on Constitution saves to avoid Exhaustion.  You require half the normal daily amount of water than normal.  

You have advantage on saving throws to resist Illusions and Illusion spells.  You have advantage on saving throws to avoid or end the Blinded condition.

You have advantage on saving throws against poison, and you have resistance against necrotic and poison damage.

You have proficiency with the Short Bow, Scimitar, and the Net.  You also have proficiency with light and medium armor. 

You have proficiency in your choice of Acrobatics OR Athletics skill.  At 1st level you gain a swim speed equal to your walking speed.  You also have proficiency with Navigator's Tools, Woodcarver's Tools and Water Vehicles.

You know the Druidcraft cantrip.  When you reach 3rd level, you can cast Fog Cloud once with this trait and regain the ability to do so when you finish a long rest. When you reach 5th level, you can cast Gust of Wind once with this trait and regain the ability to do so when you finish a long rest.  At level 5, choose Intelligence, Wisdom, or Charisma, and use that trait to determine the save DC for Gust of Wind.

You can treat salt water as regular water for drinking purposes.

You have advantage on saving throws vs Poison.  You have resistance to Cold and Poison damage.  

You have proficiency with the Trident, Net, Handaxe, and Whip.  You have proficiency with Light Armor.

Salt Dwarves are not amphibious but can sustain their breath for up to one half hour without much effort.  You can hold your breath for 30+CON modifier minutes before suffocating.

You have proficiency in Water Vehicles, Navigator's Tools, and Woodcarver's Tools.  

You have advantage on saving throws against poison, and you have resistance against lightning and poison damage

You have proficiency and Expertise with Mason's Tools.

Your hit point maximum increases by 1, and it increases by 1 every time you gain a level.

You have proficiency with the Light Hammer, Warhammer, and Maul.  You are proficient with light and medium armor.

Whenever you make an Intelligence (History) check related to the origin of stonework, you are considered proficient in the History skill and add double your proficiency bonus to the check, instead of your normal proficiency bonus.

You know the Mold Earth cantrip.  At 3rd level you can cast Earth Tremor once with this trait and regain use of it upon finishing a long rest.  At 5th level you can cast Spike Growth once with this trait and regain use of it upon finishing a long rest.