Shadow Form Level 17

Your Shadow Feat:

Blessed in Shadow. (1 use)

Once per long rest as an action you can hide in your Shadow Form to regain hp by rolling a 1d10 + your proficiency modifier.

Your Shadow Form Lvl 17:

Your Shadow Form becomes a copy of you with all your abilities, skills, feats and traits, and it looks like you in every way, mirroring whatever you are wearing or whatever have equipped, but still remains as dark as a shadow. 

Symbiotic. 

You and your shadow form share your ability and feat uses and slots.

Shadow Veil. Your Shadow Form falls flat on the floor into a pile of black glossy ooze, the ooze starts to bubble as multiple bright purple runes and glyphs form in smoke above it, the ooze then rises up and transforms into the shape of a dark figure wearing a hooded cloak that is covered in multiple small bright purple glowing runes and glyphs, the cloak and expands onto the floor in a 5 foot area that is 10 feet high, the cloaked figure opens the cloak to reveal an dark purple glowing illuminated entrance to Shadow Fell, a pocket dimension of Shar. When you or one willing creature within 5 feet enters the gateway you and/or the creature leave this realm and enter a pocket dimension is an exact copy of this world, but it is dark and shadowy, and an inverse of the light in this world. Upon entry the creature takes Psychic Damage equal to the creature's hit die +5, and then takes their hit die damage for every 5 feet of movement within shadow fell thereafter, until they leave willingly. However, any movement inside shadow Fell will reflect in the outside realm.

Upcast: You and another willing creature can enter the gateway.…and you will not take damage while moving in Shadow Fell.