Incorporial

After studying the Etherial plan you learn how to bend some of it's power.

As an action you can gain one the following benefits for 1 hour

You move through other creatures and objects as if they were difficult terrain. You take (1d10) force damage if you end your turn inside an object 

You can see 60 feet into the ethereal plan

You gain resistance to cold or necrotic damage

Creatures you choose, that can see you, must make a wisdom saving throw DC 17 or be frightened by you until the effect ends

Once you use this trait you can't do so again until you finish a long rest.