When vocalist Courtney LaPlante and guitarist Mike Stringer left the metalcore band Iwrestledabearonce to form their own group in the mid-2010s, no one expected such a massive reception to the music they would soon create. After a mediocre turnout with their first EP and singles, Spiritbox suddenly skyrocketed to the most wide-reaching new metal band while a debut studio album was still over a year away. Here are the highlights that define this growing heavy metal phenomenon.