I believe that to be the Ultimate Apocalypse mod for Soulstorm, unless I am mistaken. Which is possible.
Since nobody indicates if DoW1 and / or 2 I just throw some DoW2 Color Painter stuff in here (fiction ahead!): The Eldar of the Dark Souls, dedicated to bring death upon any enemy do not know mercy or fear. Unlike the regular Eldar, these are dedicated to bring devastating destruction upon anyone. These Crusaders of the Great Devourer seek the conquer of the galaxy in the name of the Devourer, to make this galaxy their own.
Oh yea, you didn't mention if it had to be only DOW 1, so I'll put in some DOW 2 then. Blood Ravens reporting for duty. A Wraithlord. These are pictures I captured during cut sines in the game.
I wield the power of the Dragon. Power to tear down mountains, to burn alive entire armies, to melt down the strongest of fortifications. And now you seek to hinder my stride with this crude thing of stone and metal? Pathetic.
"Hey, where'd Lirithian get two Shuriken Catapults?" "He's an Exarch." "But wouldn't they be cumbersome to wield?" "He's an Exarch, he knows what he's doing." "And why did he have to stick two banners on his back?" "They bring honour to our Shrine." "But wouldn't those be an hindrance in combat as well?" "..." "..." "Just keep running." "Rejoice, Mon'Keigh, for your death was a beautiful one." "No it wasn't." "What do you mean?" "Well, look at him! His body is covered in gore and blood! How is that 'beautiful'?" "It's . .. " "This is why you're never going to be an Aspect Warrior." "I CAN DREAM"
Not on my world! The Successor Chapter "Abyss of Macragge" from the honorable Ultramarines are Warriors of death. No Retreat, No Mercy, No seek of glory, honor or courage, simply the destruction of any enemy that is faced! The Eldar Guardians of Suns are dedicated to protect every Sun from the C'tan gods. No other fights shall be fought until every Necron danger is taken care off. These Eldar do worry about their kind and help them out also against others than Necrons, but they will be always their primary target.