Add these onto the Parent Race
Ancestral Mist
By focusing yourself, you can make the air near you fill with clouds. You can cast the fog cloud spell once with this trait, requiring no material components. You regain the ability to cast it this way when you finish a short or long rest.
Unclouded Vision
Living in the highest peaks has trained your eyes to see beyond the fog that would mar other's sight. You can see through an area covered in fog or mist as though it were only lightly obscured, provided that the mist is natural or originates from a spell you are casting.
Softened Descent
As you fall, you may use your reaction to make clouds materialize beneath you, slowing your descent. You fall at a rate of 120 feet per round and have resistance to falling damage for 1 minute.
Nimbus Resistant
Cloudborn Goliaths can withstand a thunderstorm while inside the cloud itself. You have resistance to thunder damage.