Berserk: The Golden Age Arc III - The Advent

A year after leaving the Band of the Hawk, learning they have been labelled outlaws in Midland, Guts returns to aid them in freeing Griffith from the Tower of Rebirth. However, they find out that Griffith is barely alive while rendered a mute cripple after months of being mentally and physically tortured. When Griffith tries to end his life upon realizing what he has reduced to, a solar eclipse occurs that draws him, Guts, Casca and their comrades into another dimension where they encounter the archdemons known as the God Hand. Read more on Wikipedia.