Once & Future #16 was published by Boom! Studios on February 1, 2021, as part of a series that began in 2019. Kieron Gillen writes, and art comes from Dani, Dan Mora and Tamra Bonvillain. This 32-page issue features Merlin, Sir Lancelot, Lady of the Lake, Sir Galahad and Duncan McGuire, among 6 characters cataloged on VerseDB.