Black Manta

Back in the Aquaman reboot, I suggested that our Black Manta would be a pirate ghost. Again, keeping in mind my lack of ability, here he is:

Black Manta

More a weapon than a villain, Black Manta is the ghost of a pirate who was betrayed by his crew. Those knowing The Words and willing to spill their blood into saltwater can summon Black Manta to do their bidding. Silent and implacable, Manta's rippling form gives the impression that something is peeking through at our world from the land of the watery dead. Can Arata defend himself against this adversary, or will he be forever haunted?