Teenage Mutant Ninja Turtles: Shredder #3 (IDW Publishing, 2025)

The Shredder's quest to find the rogue Foot soldier "the Mourner" takes him to Europe, where she is rumored to have procured some top-secret technology from a very distant place—Dimension X—to use in the mysterious device she's constructing. For what purpose, only the Mourner knows for sure, but it's one the Shredder is determined to undermine at all costs.