Maester Luwin gets the shaft when Ramsay Snow (ne Bolton) attacks Winterfell and an Ironborn captain just knocks him to the ground and shafts him for no apparent reason. He was trying to counsel Theon. Maybe that was his punishment. He died later in the godwood, when Osha gave him the gift of mercy.
Tis a big and beautiful world. Most of us live and die in the same corner where we were born and never get to see any of it. I don't want to be most of us.