4-1

Overview
Enemies: Darkfire Elementals, Chamber, Lost Souls, Greater Darkfire Elemental

This is 1-1 but now with a lot of different twists. The Dark Knights are replaced with Darkfire Elementals, Dark Rogues are replaced with Frost Elementals, the Invoker is replaced with a Greater Darkfire Elemental, the Darkfire Cannon is replaced with a Chamber, and the standard fire scattered around is now hellfire. Watch your step as hellfire does a lot more than normal fire, and take the elementals down with caution (Slayer would do well here ;).