Transparent. The shade Advantage on stealth checks, and creatures have disadvantage on on attack rolls on the shade.

Spellcasting. The Shade is a 3rd-level spellcaster. Its spellcasting ability is Charisma (spell save DC 13, +5 to hit with spell attacks). The Shade does not need any components for its spell and has following sorcerer spells prepared:
Cantrips : minor illusion, shocking grasp
1st level (5 slots): fog cloud, false life.

2nd level ( 3 slots) crown of madness (no concentration, lasts on target 5 mins) blindness/deafness.

walk through wall. the shade can use a bonus action to a substance blocking its way.

claw. Melee  Attack: +6 to hit, reach 7 ft., 1 target. Hit: 12 (2d10 + 2) slashing damage. 

ghostly arm.  ranged Attack: +5 to hit, range 10/50 ft., 2 targets. Hit: 20 (1d10 + 11) psychic damage.