Ethereal Step

You momentarily become ethereal, allowing you to move through creatures and objects as if they were not there. For the duration, you can pass through other creatures and objects without hindrance. You return to the material plane at the end of the duration. While ethereal, you can move through other creatures and objects as if they were difficult terrain. If you end your turn inside an object, you are shunted to the nearest unoccupied space and take force damage equal to the number of feet you are moved. While the spell is active you cannot make any melee attacks, and are immune to any melee attacks.

The spell’s duration increases by +1 rounds, each spell level above 1st.