grimdark fantasy illustration of a fully armored knight with a large greatsword in one hand. The colossal crimson sword is made of blood. The knight's armor is intricately detailed and made from a black material, covered in occult symbols and runic script and his pauldrons are large horned demon skulls. He is surrounded by an army of demonic creatures attacking. Red mist permeates the air and the light is ominously fateful. Dynamic and dramatic depiction of an epic battle scene