A shade is a small creature made entirely of shadow and due to this can change shape at will however most preferring a small dragon like appearance.
Shadow - A shade can fly and pass through small spaces but because of being made of shadow a shade is vulnerable to Radiant damage disappearing at touch and is weakened in direct sunlight (-10 feet and -4 to all rolls).
Dark form - when a shade is in complete darkness it is completely invisible and can't be detected until it is within 5 feet of a creature then the creature can sense something is in the shadows.
Blind - If a shade is within 5 feet of and creature, they can use an action to latch onto their head blinding the creature until it takes damage, the shade taking 10% of the damage hit on the creature.
Passthrough Soul - reach 0 feet, as an action a shade can pass through a creature and as long as it is living the creature will take 7 (1d10+2) necrotic damage.
Slash - reach 5 feet, as a bonus action, a shade can solidify claws and slash at a creature. The creature takes 3 (1d6) slashing damage.
into the shadows - as an action a shade can enter a shadow and teleport to another shadow with in 50 feet requiring another action to leave the shadow on its next turn.