The Sandman Universe - Nightmare Country: The Glass House (2023) #4

Plot

The immortal witch Thessaly has interjected herself into the brewing storm between heaven and hell, the waking world and dreams--and there are powerful forces who demand she pay in blood for her meddling. Thessaly, however, only has eyes for the mystery of Flynn and the Smiling Man.

As for the Corinthian? Despite his promises to Dream, he's less and less sure whose side he's on with every passing moment...