Germany built the INS Drakon, a Dolphin 2-class vessel currently undergoing sea trials

The INS Drakon is a Dolphin 2-class submarine, built by ThyssenKrupp Marine Systems (tkMS) in Kiel, Germany. It's an advanced version of the Dolphin-class, with unique features like an enlarged sail and potentially new weapon systems.
The most distinctive feature of the INS Drakon is its unusually large sail, which is widely believed to house vertical launch tubes for advanced strategic missiles, a capability not commonly found in such submarines.