The Wakers' Dozen of Riven the 1st & 13th

To Gift the Morpheus First Kill Nepenthe awoke the unborn
The spirit of Mordred ranges scores of
Leagues beyond Avalon nigh & evermore
Eyers bestow upon thee both furor & whore
Ever westward, O thou Sunz ov Wuornosse
Seventh gates of iris unfurl in repose
Goddesses' menarches curdle wells
Within sepulchral wombs cum spells
Dreamily uttered unto murdered mermaids
Cut 'er, drowned maidens murmur in spades
Of glaives that gorge of undying sheaths
Nevermore flourish the livings' wreaths