You are more then welcome to fight our loyalist brothers in combat but there will be no sympathy for your pathetic losses, we will need your corpses to feed the beings of the warp and coax them into reality to crush your defences.
HAHAHA You'se talkin' loike we gonna lose we's killin both ta 'umies and you spikey boyz den we move to da panzee eldar!
Hey now, you gotta watch those Eldar, they'll stab you right in the back when you least expect it. We of Chaos at least have the decency to stab you in the front.
If you can find us... if we're even there! OoooooOOOOOooo Ghosts!!! Actually we'll probably just watch you get eaten by Tyrannids. =p
Dem 'nids not be killin' me dey be killin' da 'umies and da spikey boyz and dey would you'se but ya panzee eldar hidin while da Orkz be choppin' da 'nids up for our pointy sticks!