Spinal from Killer Instinct as a secret boss

His theme would be a SoT version of Warlord from the Killer Instinct Reboot.
His ship would use a unique variant of the Cutthroat set, but the sail has Cthulhu on it (his shield from the Reboot) and some of the parts of the Hull glow
He would be a very hard naval boss, as he is always a Galleon, though it'd only be him and some skeletons for his crew,
if you are able to lower his anchor, Spinal would board your ship and scuttle his, you would have your ship stopped and unable to be destroyed by other ships. This would be the second phase of the boss, you against a powerful pirate foe.
His cutlass is strong but he is open to attack if he cackles, this is a 10% chance after he attacks, if you defeat him, you earn a curse that gives you his voice and his signature eyes from the original Killer Instinct. If you defeat him at least twice, you earn his hull and sail
this would only happen at random if you have completed both of the Ashen Age Tall Tales and completed their commendations, might need to be well prepared if you want to fight him as the only things you need to use are your wits and your cutlass, gunfire can't hurt him, and Anchorballs do not do a thing to his ship
if you have other crewmates on board, they'll not be able to fight Spinal but they'll earn the curse if they are in the crew, only the captain can fight Spinal as they're a worthy opponent, but if the captain dies, a crewmate must take their place, if everyone dies, you and your crew (if you have one) are forced into an outpost with a new ship as Spinal has taken that ship and turned it into his galleon