Jack-o-lucerna

Real name Rey, he goes by many different names, Calabaza (or Rey Calabaza), The Pumpkin king, and The Headless Horseman. Jack has seemingly been around for a while, long enough to become a legend at least. These days he spends his time sailing along the ocean and looking for mystical treasure. He seems to be just a little bit, off his rockers but i mean its fine, right?
He has ghost powers.