In Hell when you're standing at the altar in the middle of arena (also known as Icon of Sin's Domain), you then takes a glowing blue Soulsphere on it until Baphomet aka Icon Of Sin then emerges himself from the top of a bloodfall while visible as towering upon you and he then started chattering his unholy introductory speech to you while his eye glowing red, because your arrival into the arena and for taking a Soulsphere from the altar

".oremoR nhoJ ,em llik tsum uoy ,emag eht niw oT" (To win the game, you must kill me, John Romero./You cannot stop me, mortal.)