Complex sentence: After fighting and losing to Death, Mort is given an extra lease on life when the Grim Reaper chooses to turn over his Lifetimer, allowing Mort to stay in the world of the living.
Split into simpler sentences: After fighting and losing to Death, Mort is given an extra lease on life when the Grim Reaper chooses to turn over his Lifetimer. This allows Mort to stay in the world of the living.