Diablo's eyes narrowed. "Unmask me? Jack you are more of an inane imbecile than I took you for. Why would you subject yourself to my history?"
"Curiosity I suppose, lad." Jack shrugged, tucking the necklace into his shirt.
"I will not even hypothetically be put on display as a sideshow act." Diablo spat through his mask. Jack raised an eyebrow casually and looked very serious.
"You have an alternative proposition then."
"You already know it Jack. It's what you came here for isn't it?"
"To be sure." Jack imitated with a wave of his hand. The two pirates were circling each other now, like great, wary cats. Never blinking. Never taking their eyes off each other. Ready for anything. "The Tudor Diamonds versus L'Etoile Vie, Savvy?"
"Savvy." Repeated Diablo. On his word, the crew immediately cleared a dueling area on the deck of the ship.
"Cap'n," the helmsman murmured urgently "fog's rollin' in Sar."
"Weigh anchor, lower the flag, and raise a man for a lookout," Diablo muttered quietly. As the man turned to leave, the captain caught him by the sleave. "Don't let him miss an incoming ship sirrah. I don't trust Jack Sparrow as far as he can fly." The mate nodded and hurried off and Diablo addressed his opponent. "Regular niceties Jack?"
"Wouldn't dream of it any other way old boy." Sparrow answered. They walked up to each other, swords raised. They simultaneously lowered them out to the side and took three large steps away.
"Ready?" Diablo called moving into position
"Probably," replied Jack, shifting his weight.
"En Garde." Diablo drawled, and lunged forward, aiming for Jack's heart. Jack, however, slashed for Diablo's face. He ducked and whirled away, leaving Jack slicing nothing but a bit off his hat's ostrich feather.
"Nice Hat," Jack commented, lunging forward. Diablo deftly dealt thrusts, easily parrying Sparrow's attacks.
"Come now Jack, you're a better swordsman than that. You must have crossed swords with Barbosa, and your alive." They spun around, each on a side of the mast.
"Aye, but the difference was we were both already dead." Jack grabbed a line and slashed the knot, sending him soaring up to the crosspieces for the sails as the pirates flag dropped.
"Come on Diablo, where's your sense of fun!" Jack laughed, jabbing his sword at the air.
"Right here." Diablo threw back, twirling a throwing knife between his fingers. He threw it into the mast and Jack tensed as it stuck in the mast. Diablo jumped to catch it, using it to climb up the mast to where Jack lounged.
"You can't use those Captain Devil!" Jack teased, breathing a sigh of relief as Diablo swung himself onto the crossmast.
"Nay, not on you or you'd be dead already!"
Diablo hammered blows at Jacks head, leaving Jack no choice but to focus all his energy on blocking and balancing, and both were suffering. Jack wobbled precariously, and at the last second before Diablo brought his sword down on Jack's skull, he switched his direction and rapped the sword out of Jack's hands instead. It flipped through the air and lodged itself ominously in the deck, shuddering from the impact. Diablo grabbed Jack's shirt before he fell, and pulled him back onto the crosspiece.
"Thankee Cap'n."
Jack said with another sweeping bow. He grabbed the rope that brought him up, and swung back down, palming the throwing knife off the mast as he did. He rolled on the deck and attempted to pull his stuck sword free. Diablo slid down the mast and lunged for Jack just as he recovered his sword, but Diablo easily knocked it away again, pressing his sword tip gently into Jack's throat, who froze and swallowed, his famous grin tugging at the corner of his mouth.
"Bravo Captain. That really was fantastic."
He reached into his shirt as if to retrieve the necklace, but instead he pulled out a dagger and slashed Diablo's mask. It dropped, revealing a surprisingly young, clean-shaven chin with no visible damage to it. Diablo backed away, keeping his sword pointed at Jack while the other hand attempted to cover his face with his Arabic cloak.
"Such audacity is repaid with death." Diablo threatened furiously, his eyes snapping.
"Sorry Captain, you know what they say. Curiosity killed the cat!"
With that, Jack threw Diablo's throwing knife he had seized off the mast. It went right through the crown of Diablo's hat, pinning it to the Captain's Quarters door. The entire ship froze as Diablo's hair braided hair tumbled down and the gentle breeze tousled it.
"Well, that was unexpected." Jack admitted, "May I present the real Captain Diablo- er, Diab-la."