Create husks

you meditate while chanting in abyssal. When the hour over, everyone around you in a 1 mile radius who has a hit point total less than 10 hit points. all people affected become shells of their former lives, basically becoming trapped inside their own minds. if the spellcaster decides, he can capture the souls off all people affected. with every soul the spellcaster takes, he can live 1 year longer. he could also choose to give an amount of those years to an ally.