Enthropic essence

You obtain the ability to dwell along the barrier between the material and the ethereal world for a short period of time. Until the spell ends you gain resistence to all damage types except force and psichic; your movement doesn't provoke opportunity attacks and you can move in the space occupied by other creatures and objects as if it were difficult terrain; however if you end your turn inside the space occupied by a solid object or creature you take 1d10 force damage. As a Magic action action and as part of the casting of this spell you can make a number of melee spell attacks equal to 1+ half your proficiency bonus rounded up, dealing 2d10 + spellcasting ability modifier force damage on a hit. Moreover you teleport to any point within 5ft from the target you just hit. If you use your action to cast another spell, this spell ends abruptly, you reappear in the Material Plane and you take 1d10 force damage.