Create an album cover featuring a scene reminiscent of medieval fantasy

Create an album cover featuring a scene reminiscent of medieval fantasy. The scene should have intense, epic and dark colours. Include four heroes of varying descents - Caucasian, Hispanic, Middle-Eastern, and South Asian - all clad in armor and engaging in combat with a giant villain. The environment should be filled with chaos and fantastical elements, reflecting a dark and violent battle with debris, sparks, and splashes of blood.