You have to stun the black hand using your arrows (I think) and then steal the sol when it gets paralysed. Put the sol onto the little circle specifically for it, then get onto the platform with the exit (it should be clear how to do this), then hookshot the sol towards you and exit. Be quick, the black hand comes back in every room and tries to steal the sol from you. Don't let it get it, because it takes it way back to the first room and you'll have to start again. Hope this helps.