Monster Manual 5e
Incorporeal Movement: The Demon can move through other creatures and objects as if they were difficult terrain. It takes 5 (1d10) force damage if it ends its turn inside an object. Light Sensitivity: While in bright light, the Demon has disadvantage on attack rolls, as well as on Wisdom (Perception) checks that rely on sight. Shadow Stealth: While in dim light or darkness, the Demon can take the Hide action as a bonus action.
Claws: Melee Weapon Attack: +5 to hit, reach 5ft., one creature. Hit: 10 (2d6 +3) psychic damage or, if the demon had advantage on the attack roll, 17 (4d6 + 3) psychic damage.