Ice Dwarf - D&D 5e Subrace

You are a member of the first primordial race, which mastered Elemental Magic as well as Necromancy, and carved out the Underdark before the Drow invaded it.

Alignment.  Most Ice Dwarves are firmly in the Lawful Evil camp.  But the Order of the Ancestors actively opposed this philosophy, and joined the Mountain Dwarves in a war against the Ice Dwarves.  This war purged most of the evil Ice Dwarves from the eastern part of the world.

Ability Score Increase.  Your Intelligence score increases by 1.

Icy Resistance.  You have resistance to cold damage.

Icecunning.  As Stonecunning, but also applies to ice and cold.