Turn Resistance. The Undead Samurai has advantage on saving Throws against any effect that turns Undead

Undead Fortitude. If damage reduces the zombie to 0 hit points, it must make a Constitution saving throw with a DC of 5 + the damage taken, unless the damage is radiant or from a critical hit. On a success, the zombie drops to 1 hit point instead.

Multiattack. The Undead Samurai makes two Weapon attacks.

Nodachi. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 18 (4d6 + 4) slashing damage. If the Samurai hits a target with a Nodachi attack, it can make a bonus action attack against another target within 5 feet of the original target

Katana. Melee Weapon Attack: +6 to hit, range 5 ft., one target. Hit: 13 (2d8 + 4) slashing damage, or 15 (2d10 + 4) slashing damage it used with two hands.