Density Records signed TLTSOL, and their second album, Invivo (Exvivo), appeared in October 2013. As before, the group toured with other high-impact metal acts such as I Declare War, Fit for an Autopsy, Thy Art Is Murder, and Kublai Khan. In 2014, the band returned to Atrium Audio in Lancaster to begin work on their next album, Soulless Hymns. When Soulless Hymns arrived in January 2015, it quickly became the group's biggest success to date, debuting at #22 on Billboard's Hard Rock Albums charts and #14 on the Heatseekers chart. In October 2015, TLTSOL announced that Storm Strope had left the band, and John Robert Centorrino had been recruited to fill in for him during a concert tour later in the year. The band revealed Centorrino had officially signed on as their new singer in May 2016. The Violent Sound was released in November 2016, and like its predecessor, jumped into the Heatseekers Chart at #14.