That same year the band opened up for Mortification on their Blood World tour .
Drummer Sean Griego joined the band in 1995 , whose more aggressive style helped the band morph from traditional heavy metal to a more aggressive speed and thrash metal style .
That same year the band opened up for Mortification on band 's Blood World tour .
Drummer Sean Griego joined the band in 1995 , whose more aggressive style helped the band morph from traditional heavy metal to a more aggressive speed and thrash metal style .