Fantasy book

[dunnowhat]

Looking for a book where theres this evil force called the grim something I think, and the force was defeated a long time before by a group of warriors including this wizard whos name starts with a V, and they all slowly die out until it's just the wizard left and apparently the force is returning and then at the end they find out that the wizard didnt want to die so hed been sacrificing young girls? i think, to this evil force and they see the force looks like a little girl