Wraithknight
The Wraithknight is a massive Wraithbone construct, towering even over the tall Wraithguard and massive Wraithlord design to harvest new soul stones forom Crone Worlds. They can be armed with a pair of massive fuck-off Wraithcannons, a Suncannon or a Scattershield Duel Disk and a huge Ghost Glaive.
They are for the Eldar what the XV-104 Riptide and Dreadknight are to the Tau and Grey Knights, except less stupid in the case of the latter. It is an enormous model and a lethal one, making it a massive fire magnet in a more literal way than usual. While it's WS and BS are kind of meh (both 4), it's a Jump Monstrous Creature with S 10 and 5 attacks and I 5. It's impressive in defence but not too much: T8, 6 wounds and 3+ armour; also the option of a 5++ blinding anyone at 6" each time it saves this way. Cool, but sort of disappointing. Deepstrike it for that O.O look on the other guys face.
Like other wraithbone constructs, Wraithknights are animated by souls of dead Eldar. Wraithknights are special because they also have pilots; in particular, the pilot must be the twin of the soul animating the machine. It seems that the designers must have been watching Evangelion or Pacific Rim the night before designing the Wraithknight.