Dwarves

Sons of Stone
According to dwarven mythology, the gods formed the dwarven race out of the living rock of the earth, in the ancient ages of the world. The myth is well told, for the dwarves are as stubborn as iron, and as hearty as granite. They are native to the continent of Palagos, and their earliest histories tell of unrelenting warfare with the Orcholds of the surface world.

Under the earth, they flourished, and their Hollow Empire spread to all corners of that land. However, dark things also ruled in the underworld, and dwarven city after dwarven city fell to Saorshas, the Spellrot, a foul dracolich, which fed on the life force of their people. Only two hundred years ago, in the year 457, the year of the Axe, did Saorshas perish at the hand of the Paladin Grima Voole, and his company. The twenty-third day of Erastus is holy to the dwarves, to this day. The destruction of the dwarven kingdoms is still within living memory, to the older generations.

Dwarves are unique among the races of the world, in that they have no connection to arcane magic, whatsoever. Magic of all kinds has little effect on them, and they are able to overcome spells that would incinerate any other race. As they grow more experienced, some dwarves are able to hone this arcane void, and use it to disrupt the magic of other races.

Racial Features
In addition to the racial benefits laid out in the PHB, dwarves receive the following benefits:

Spell Resistance: Dwarves are tough to affect with magic. They can use their Constitution in the place of any other saving throw vs. spells or spell-like effects.

Counter Magic: At 5th level, dwarves gain the ability to cast Counterspell as a 3rd level spell as a reaction once per long rest, ignoring material, verbal, and somatic components.

Magical Void: Dwarves cannot choose the following classes and archetypes: Further, Dwarves cannot choose spells from the Bard, Sorcerer, or Wizard spell lists for the following Feats: Dwarven Technology: Dwarves are able to choose the Gunslinger Martial Archetype.
 * Arcane Trickster
 * Bard
 * Eldritch Knight
 * Sorcerer
 * Wizard
 * Magic Initiate
 * Ritual Caster
 * Spell Sniper