Ghost Breastplate

While wearing this armor, you can speak its command word as a bonus action to move incorporeally for 1 round. You can move through other creatures and objects as if they were difficult terrain. You take 5 (1d10) force damage if you end your turn inside an object. You can use this ability a number of rounds per day equal to your level.

This armor consists of a fitted metal chest piece worn with supple leather. Although it leaves the legs and arms relatively unprotected, this armor provides good protection for the wearer's vital organs while leaving the wearer relatively unencumbered.