You gain resistance to slashing damage. you gain a vulnerability to bludgeoning damage 

Earthen origin: you know the Mold earth cantrip. At level three you learn Absorb elements. At level five you learn Hold person. Once per long rest you may cast Absorb elements/Hold Person using this feature. Once you cast Absorb elements or Hold person with this trait, you can't cast that spell with it again until you finish a long rest. You can also cast either of those spells using any spell slots you have of the appropriate level. Intelligence, Wisdom, or Charisma is your spellcasting ability for these spells when you cast them with this trait (choose when you select this race)

Seismic sense: you are unaffected by the blindness condition as long as the action being taken involves objects/creatures touching the ground.

Attuned with the world: once per week the crystal walkers must attune with the earth to regain their strength. This may be done in a long rest. they must be on naturally formed ground to do this. (this functions as sleep but only must be done once per week as a replacement to sleep)

+2 Con

+1 Wis