Wiegraf is the first unit you fight who can use sword skills, making him rather dangerous. A typical assassination battle, I don't waste time with the other units and just concentrate on him.
There is one main strategy which works wonders for him. He always has Counter Magic, and you can use this to your advantage. If the setup is right, he brings doom to himself. It's beautiful to see.
I had to restart this battle two or three times, but my goal was to test setups to make it work right. Sometimes, he has Battle Boots like in this case here. It doesn't really matter much though.
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