My submission for this week's Splinterlands Art Contest!
From the Slinterlands Wiki:
The Phantom of the Abyss is rarely seen by the water breathers of Azmare; he lives deep in the dark water. He is a shadowy and mysterious figure with incredible powers of mind control. Sometimes his glowing blue eyes can be seen from a boat, far beneath the surface of the water. Every child of the Azmare Archipelago has heard nightmare stories of the Phantom.
Painted in Clip Studio Paint Pro on a Surface Pro 4. Here is the timelapse video: