Your Strength score increases by 2, and your Constitution score increases by 1.

Chain Devils do not need to develop. They live Indefinitely.

Chain Devils are taller and heavier than humans, standing well over 6 feet tall and averaging almost 250 pounds. Your size is Medium.

Your base walking speed is 30 feet.

You may use an action to attack with your Chain.

Chain. Melee weapon attack: +2 to hit, reach 10ft, one target, (2D6+2) slashing damage. The target is grappled (escape DC 12) If you aren't already grappling a creature. until the grapple ends, the target is restrained and takes (2+D4) piercing damage at the start of each of your turns.

Unnerving Mask. When a creature you can see starts its turn within 30 feet of you, you can create the illusion that it looks like one of the creature's departed loved ones or bitter enemies. If the creature can see you, it must succeed on a DC 12 Wisdom saving throw or be frightened until the end of its turn.

You have resistance to cold damage.

You can speak, read, and write Common and Infernal.