Devil are the boss you need to kill to disable the Apocalypse. He will attack the player by slowly moving toward them and inflicting damage by making contact. He is immunized against fire.
How to have ?Edit
Devil have a speed of 0.25D (same speed as skeleton), a life of 200 hearts, and when he attacks, he it takes us 5 heart.
When devil die, he drop between 1 Nether Star.