The Rumour Engine continues to turn out new mysteries - on your marks... get set... wildly speculate!
Let us know what you think it might be on the Warhammer 40,000 and Warhammer Age of Sigmar Facebook pages. Alternatively, check out the Rumour Engine archive - we’ve confirmed what some particularly baffling entries are if you’re still curious!
UPDATE: This image has been revealed as part of the Akhelian Leviadon.