Lamb of God and Mastodon tease collaboration/split

Lamb of God and Mastodon recently wrapped up their "Ashes of Leviathan" tour, which found both bands celebrating 20 years of Ashes of the Wake and Leviathan every show performing the albums in full. 

Last night, Mastodon tweeted what appears to hint at a collaboration between the two bands arriving next week. 

Fans may remember that Lamb of God and Kreator did a similar thing last year after touring together.