Multiattack. The Zin Knight makes two melee attacks.

Longsword. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 7 (1d8 + 3) slashing damage.

Unyielding. When the Zin Knight is subjected to an effect that would move it, knock it prone, or both, it can use its reaction to be neither moved nor knocked prone.