Original: Originally , the group 's musical style was largely composed of short , simple songs , which would evolve over the years into heavily hardcore-influenced crossover thrash , with Gwar 's musical experimentation becoming present in Scumdogs of the Universe , America Must Be Destroyed and This Toilet Earth .
Simplified: Joey Byalwec left the band in 1986 eventually making Oderus Humongous no longer the groups guitar player but GWARs permanent vocalist and Balsac the Jaws of Death no longer the bands bass guitarist But the bands Backup vocalist .