Ahhh.... try a backflip, one or several times, to reach the stone! The wraiths can´t be killed, I mean!
Hope, this helps... take care of your stones and the order of the puzzles.
To decide, what´s coming next, read the gamebanshee walkthrough
[QUOTE=tanknight]I can't kill 2 Shadow Wraith in the Shadow Ruin, at a room that has a shadow stone fly above the roof. What coul I do, help me please, thank a lot.[/QUOTE]
After grabbing the crystal you can kill the wraiths. And as the previous poster suggested, try a backflip.