Ambusher. In the first round of combat, the mantis has advantage on attack rolls against any creature it surprised. Surprise Attack. If the mantis surprises a creature and hits it with an attack during the first round of combat, the target takes an additional 2 (1d4) damage from the attack.
Multiattack. The mantis makes two attacks: Both with its claw. Claw. Melee Weapon Attack: +2 to hit, reach 10 ft., one target. Hit: 2 slashing damage. Target must make a DC 8 saving throw or be grappled(escape dc 14 as of targets next turn) until this grapple ends, the creature is restrained, and the Mantis can't claw another target. Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., one creature grappled by the mantis. Hit: 8 1d8+4 (1d8 + 4) piercing damage.