Assassin Devil (Dogai)

Assassinate. During its first turn, the devil has advantage on attack rolls against any creature that hasn't taken a turn. Any hit the devil scores against a surprised creature is a critical hit.

Devil's Sight. Magical darkness doesn't impede the devil's darkvision.

Evasion. If the assassin is subjected to an effect that allows it to make a Dexterity saving throw to take only half damage, the assassin instead takes no damage if it succeeds on the saving throw, and only half damage if it fails.

Magic Resistance. The devil has advantage on saving throws against spells and other magical effects.

Sneak Attack. Once per turn, the devil deals an extra 21 (7d6) damage when it hits a target with a weapon attack and has advantage on the attack roll, or when the target is within 5 feet of an ally of the assassin that isn't incapacitated and the devil doesn't have disadvantage on the attack roll.

Multiattack. The devil makes two cold iron longsword attacks.

Cold Iron Longsword. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 9 (1d8 + 5) slashing damage, or 10 (1d10 + 5) slashing damage if used with two hands to make a melee attack. If the target is a demon or fey, it receives and additional 4 (1d8) slashing damage, or 5 (1d10) slashing damage if used with two hands to make a melee attack. On a successful hit, the target must make a DC 12 Strength saving throw or be pushed 5 feet in a direction of the devil's choice. The target has advantage on its saving throw if it is Large or larger.

Spellcasting. The devil casts one of the following spells using Intelligence as the spell casting ability (spell save DC 14).

At will: disguise self

1/day: teleport (self plus 50 pounds of gear only)

4/day: dimension door, fog cloud, nondetection, tongues

Shadow Stealth. While in dim light or darkness, the devil takes the hide action.