Multiattack. The Vistani duelist makes three attacks with their sabre and one with their sword breaker.

Sabre. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 8 (1d8 + 4) slashing damage.

Sword Breaker. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 3 (1d4+1) piercing damage.

Parry. The Vistani adds 3 to their AC against one melee attack that would hit them. To do so, the Vistani must see the attacker and be wielding a melee weapon.

Sword Grapple.  When a creature hits the Vistani with a bladed weapon, they can use their reaction to attempt to catch that weapon in their sword breaker. Roll 1d10 + 4 (Vistani Dexterity modifier). If the result is equal to or greater than the damage dealt by the attacker's weapon the Vistani grapples the attacker by catching its weapon, and the attack deals no damage.

The attacker may escape the grapple in the normal way, or by dropping the caught weapon. Similarly, the grapple ends if the Vistani drops the sword breaker.