Black Sabbath unveiled another new track last night during a show in Australia. The song, "Londer," can be heard — and seen (sort of) — below, courtesy of some fan-filled video.

Black Sabbath have confirmed a 20-city North American trek that kicks off July 25 in Houston, Texas. The tour also will include stops in Philadelphia, Boston, Tinley Park (Chicago), San Francisco and other major markets, along with the previously announced stops in Holmdel, New Jersey; Los Angeles, Seattle and Toronto, Ontario.

Black Sabbath kicked off their world tour in Auckland, New Zealand, over the weekend. As expected, their set list included several tracks from their new album, 13, which will be released June 11.

In a new interview with the Birmingham Mail in England, Black Sabbath guitarist Tony Iommi provided an update on his cancer treatment. The guitarist has been receiving treatment at the Parkway Hospital in Solihull. He will have to return home from tour on a regular basis in order to receive treatment.