X-Men: Before The Fall - Sinister Four (2023) #1

FALL OF X IS COMING! As the nineteenth century drew to a close, the dying Nathaniel Essex unleashed four clones of himself into the world. They've been haunting it ever since, while lurking in the shadows. We know what Sinister has been up to. What about the others? In this issue, we delve into their past...and discover their latest atrocity.