Fire Wall

The Fire Wall is in the top 15 hardest bosses in the game.

This boss is automatically spawned once you kill all over world and under world bosses (not Fire Wall) and has killed the Devil the most recent. He is a giant wave of fire and lava he does no damage but when he runs into you you lose half your health and get the burning effect he has 10000 health and no protection. He is very weak against water. He drops a fire runner, your own wave of fire and unlocks the Death world once you have defeated the eclipse and done a fair bit in the space world.