Death in the Weasley family?!

[owlery2003]

No: HPFGUIDX 66950

Percy seems the best bet. He's got blinders on, and that will make 
him an easy target. Maybe the imperius curse to deepen his 
misconceptions, and then turning him against his own family. At the 
last moment, he realizes what he's about to do, and . . . something 
bad happens to him. There would have to be a chance of redemption, 
then Percy's death would be a rallying point.