 Hardcore subsequently became a broad term, as a variety of different styles of hardcore bands arose, such as melodic hardcore (Avail, Lifetime, Kid Dynamite), emo (Endpoint, Saves the Day), D-beat (Aus Rotten, Skitsystem), powerviolence (Spazz, Dropdead, Charles Bronson), thrashcore (What Happens Next?, Voorhees, Vivisick), mathcore (the Dillinger Escape Plan, Botch, Converge), screamo (Heroin, Antioch Arrow, Portraits of Past, Swing Kids) and rapcore (Biohazard).While the 1990s had many different sounds and styles emerging, the genre primarily branched into two directions; "new school" metallic hardcore (also referred as metalcore), which incorporated aspects of thrash metal and death metal for a heavier and more technical sound, and "old school", reminiscent of the classic beginnings of hardcore punk.