It creates more ash piles is what it does and since i hate ash piles its not a shout i care for nor will i ever use.

The reason that didn't work is because you cast it on the person when they're alive and it removes there soul ( I think it gets sent to the Soul Cairn ) and there body becomes your thrall. I think you can only use it one people and not animals which is kind of bad

It creates more ash piles is what it does and since i hate ash piles its not a shout i care for nor will i ever use.