Emerald Eye. Zaroums magic eye is immune to any blinding, darkness, or other magical effects that try to impede vision.

Gemmed Jacket. Zaroums armor is covered in the rarest gems. The high concentration of gems alters magic in their direct vicinity. Spells cast on Zaroum or within 5 ft of him suffer the following:

Zaroum adds +2 to any DC saves he makes

Zaroum gains +4 AC against any spell attacks 

Spells cast within 5 ft of Zaroum fail if the caster doesnt pass a DC 10 WIS save. 

Multiattack. The captain makes two melee attacks with his scimitar.

Scimitar. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 6 (2d6 + 3) slashing damage.

Emerald Gaze. As a bonus action, Zaroum can force a target to make a DC 15 Constitution saving throw when he stares at them with his Magical Gem Eye. A creature that fails the save begins to turn into an Emerald Statue and is restrained. The restrained creature must repeat the saving throw at the end of its next turns, becoming petrified on a third failure or ending the effect on a success. The petrification lasts until the creature is freed by the greater restoration spell or other magic.
Unless surprised, a creature can avert its eyes to avoid the saving throw at the start of its turn. If the creature does so, it can't see the medusa until the start of its next turn, when it can avert its eyes again. If the creature looks at the medusa in the meantime, it must immediately make the save. A creature is immune for the rest of combat once it has passed the saving throw.

Parry. The captain adds 2 to its AC against one melee attack that would hit it. To do so, the captain must see the attacker and be wielding a melee weapon.

Redirect. When a creature the bandit lord can see targets it with an attack, the bandit lord chooses an ally within 5 feet of it. The bandit lord and the ally swap places, and the chosen ally becomes the target instead.