It will, in time. Speak of the soulbroken.
He continued, slower now. 'My Legion encountered them not long after we sailed from Colchis the very first time. A fleet of elder, their vessels built of bone, drifting through the void powered by immense solar sails. I met with their farseers, to determine their place in Mankind's galaxy. During those weeks, I mastered their tongue.'
Lorgar took another breath, thinking back to that time. 'It was easy to despise them. Their inhumanity made them cold; their skin stank of bitter oil and alien sweat, and their vaunted wisdom came at the cost of sneering condescension. What right did a dying breed have to judge us inferior? I asked them this, and they had no answer.'
He laughed again, the same gentle sound. 'They named us mon-keigh, their term for so-called ''lesser races''. And yet, while they were easy to hate, there was much to admire in them, as well. Their existence is a tragic one.'
And what of your Legion?
'We destroyed them,' the primarch admitted. 'At great cost, in both warships and loyal lives. They care for nothing but survival, the ferocious need to continue their existence saturates their whole culture. None of them ever die easily, nor do they fall cleanly.'
In canon, Lorgar murdered an eldar refuge fleet soon after he was reunited with his Legion. Something to look out for, as they're probably in the general neighbourhood.