Chain Devil

If the monster dies outside the Nine Hells, its body disappears in sulfurous smoke, and it gains a new body instantly, reviving with all its Hit Points somewhere in the Nine Hells.

The monster has Advantage on saving throws against spells and other magical effects.

The monster makes two attacks and uses .

The devil conjures a fiery chain to bind a creature.
Dexterity Saving Throw: DC , the monster can see within feet.
Failure: damage, and the target has the Restrained condition until the end of the monster's next turn, at which point the chain disappears. If the target is Large or smaller, the devil moves the target up to 30 feet straight toward itself.
Success: The chain disappears.

. . If the target is a Large or smaller creature, it has the Grappled condition (escape DC ) from one of two chains, and it has the Restrained condition until the grapple ends.

Trigger: A the monster can see starts its turn within feet of the monster and can see the monster.
Response-Wisdom Saving Throw: DC , the triggering .
Failure: The target has the Frightened condition until the end of its turn.
Success: The target is immune to this monster's Unnerving Gaze for 24 hours.