Martial Advantage. Once per turn, Zhang Fei can deal an extra 10 (3d6) damage to a creature he hits with a weapon attack if that creature is within 5 feet of an ally of Zhang Fei that isn’t incapacitated.

Sworn Brothers. when within 5 feet of his sworn brothers he may use his reaction to take a hit for them only taking half damage from the attack.

Multiattack. Zhang Fei makes two Viper Blade attacks.

Viper Blade. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 9 (2d6 + 2) piercing damage.