From Destinypedia, the Destiny wiki
Bracus Zahn is the boss of the The Arms Dealer Strike in Destiny 2. He is a notorious weaponsmith having been targeted by both the Tower Vanguard and Emperor Calus for supplying weapons to the Red Legion.
Bracus Zahn is a Cabal officer distinguished by his unusual green armor. He leads a contingent of similarly-armored Red Legion soldiers, possibly renegades or criminals based on their titles. Zahn carries multiple weapons and will switch between them throughout the fight against him, due to his role as a weaponsmith and arms dealer.
Upon the initial confrontation, Zahn will jump from a Cabal ship onto another platform, where he will summon Volcanic Scorpius along with other Cabal. He will be armed with a Slug Rifle for this first section. After doing some damage to him and killing all other enemies, he'll jump to a second platform and do the same thing. Once again, after doing damage to him and killing adds, he will fly upwards and into an airfield. The player must activate a lift and kill more Cabal foot soldiers to continue the fight. Once the lift has reached the top, Bracus Zahn will be waiting at the top armed with a Cabal Headhunter sniper rifle, which can punch through Guardian shields with ease at long range, and at close range he will use his jump jets to create a shockwave that will knock players back a significant distance and into greater dangers. This shockwave will leave behind spots of fire that ignite anyone that steps in them. He will summon four Volcanic Scorpius. At this point, the player can start doing permanent damage to the boss. Every third of his health that is taken down, though, Zahn will fly onto one of two pillars and surround himself in a shield. The only way to remove the shield to continue the fight is to pick up a Flame Core (which appears after enough adds are killed and a Cabal Thresher removes a Goliath Tank on top of it) and "dunk" it into a receiver on the opposite side of the map, similar to earlier in the Strike. Throughout the encounter, smaller Cabal enemies will continue to spawn. When at 50% health, Zahn will switch his equipped weapon to a Cabal Slug Shotgun.
List of appearances