The Cursed Pirate Zombie Boss is a new boss added in 126.96.36.199 update in Unturned. It can be unlocked solving the Mk. II Puzzle.
It acts similar to the Zombie Bosses. It can spit fire like the Flamethrower Zombie Boss, it can hit you with a lightning strike similar to Lightningstrike Zombie Boss and it can generate earthquakes like the Groundpounder Zombie Boss. It can also spit acid like the Acid Zombie and throw boulders like a regular Mega Zombie.