Multiattack

The nephirron devil makes one bite attack and two claw attacks.

Bite

Melee Weapon Attack: +13 to hit, reach 10 ft., one target. Hit: 26 (4d8 + 8) piercing damage. If the target is a creature, it must succeed on a DC 19 Constitution saving throw or fall unconscious for 1 minute, or until it takes damage or someone uses an action to shake or slap it awake. Dragons and dragon-like creatures, such as dragonborn, have disadvantage on this saving throw.

Claw

Melee Weapon Attack: +13 to hit, reach 5 ft., one target. Hit: 15 (2d6 + 8) slashing damage.