Even Trevor Strnad's arm makes a guest appearance! Enjoy." Carcass continued touring. They played at Download Festival in Castle Donington 13 June 2015. Reviewing their concert, James Weaver wrote: "Carcass have proved, not only that they can play any spectrum of rock festivals, but that they still remain as one of the greats in the extreme metal genre." Carcass also headlined the "Deathcrusher 2015" tour alongside Napalm Death, Obituary, Voivod and Herod. The tour run in Europe October–November 2015. During the "Deathcrusher 2015" tour Bill Steer rejoined his former band Napalm Death on some dates to perform the classic Napalm Death song "Deceiver". Along with Testament, Carcass supported Slayer on their "Repentless" tour, which took place in February and March 2016. In a statement released in early March 2018, Ben Ash announced he had left Carcass. Tom Draper (Pounder, ex-Angel Witch), a UK native based in California, made his first live appearance with the band at the Netherlands Deathfest on 2 March 2018 and his second appearance during the Decibel Metal and Beer Fest in Philadelphia on 1 April 2018. They also opened for Slayer on selected dates of their final world tour, including ForceFest in Mexico in October 2018, and Hellfest in France in June 2019. On 13 December 2019, Carcass released their first song in six years, "Under the Scalpel Blade", on digital outlets. This track was also made available to deluxe "Decibel" magazine subscribers. On 23 February 2020, Carcass announced on their Facebook page that their seventh studio album would be released on 7 August. A week-and-a-half later, guitarist Bill Steer revealed "Torn Arteries" as the title of the album, which is a reference to a demo tape recorded by original Carcass drummer Ken Owen when he was a teenager. On 2 April 2020, Carcass announced that the release of "Torn Arteries" had been pushed back from 7 August to a later date, due to the coronavirus pandemic, stating: "Well there's no way our new album is gonna get released in August now, what with the ongoing pandemic, CD & vinyl manufacturers have closed and label distribution has been put on hold for the foreseeable future. There's more pressing things to be concerned with right now, correct? Bunker down, look after yourselves, let's see the next few months through and we'll get the album released as soon as there's some kind of return to 'normality'."