This is my first time entering "The Week of Awesome". For the "Death is Useful" theme, I'm making a game with a Necromancer Lich, and plan to address the theme in two ways. The first is obvious for a necromancer, making use of an opponents death by raising the dead. I also plan to make the players own death useful by recharging magic energy, and leveling up their abilities before returning to life. This might include a push your luck element, as the longer you stay in spirit form leveling up your abilities, the longer you're at risk of getting banished by spiritual enemies, ending your game.
I hope I didn't bite off more than I can chew with this one.