In March 2011, "Gothic Kabbalah" singer Katarina Lilja left the band for a second time to "re-join the boring civil world and not be a cool rock star anymore". Thomas Vikström's daughter, Linnéa, provided supporting vocals for the band since the Bloodstock Open Air festival in 2011. Therion performed at Hellfest Summer Open Air, ProgPower USA, and the 2012 cruise liner based festival 70000 Tons of Metal. In a Bloodstock interview, Shaw mentioned that the band will work on new material at the end of the year. In September 2011, after four years of collaboration and session work, vocalist Lori Lewis joined Therion as a member. In this year also a board game called "011" was released; it features the band members and is based on the "Sitra Ahra" album.