Hemlock Wraithfighter
The Eldar needed a fancy jetfighter to allow them to dominate the battle and thus they came up with the Hemlock Wraithfighter. This fast flying vessel is manned with a spiritseer along with spiritstones. This most likely allows them to use some nifty psychic predicting to get the best targets. This is good, because armed with two heavy D-scythes this thing can do swift hit and run attacks to wrack your army's shit up.
For some reason, the Eldar really hate having to use these in battle.