I have the ultimate anti-wraithblade weapons:
Mind control. I order you to stab yourself with your own sword.
Frost Magic. I freeze you solid in magical Ice.
Portal Magic. I transport you to a windowless dungeon in the depths of the earth.
Spirit Magic. I ask the spirit of the war-god Kaos to remove your blade from the battlefield.
If your blade is supposedly capable of defeating all of these counters, it is too powerful and no spell culd ever exist to keep the metal of your blade from shattering the first time that power was tapped. (Well, One spell...And one Metal...But you have to find those on your own...)
MUAHAHAHAHA!!!!!
-Twilight Storm