Marvel has a habit of introducing new cosmic heroes or villains who get billed as the most powerful in the universe. But when it comes to all-powerful weapons, then Marvel gets tight lipped. Most people know the Infinity Gems to be the most powerful Marvel weapon. But all that might change with the All-Black Necrosword. What Is The All-Black Necrosword? [caption id="attachment_34517" align="alignnone" width="450"] The All-Black Necrosword has been coveted by many. Pic courtesy: reddit.com[/caption] The Infinity Stones have been playing a less prominent role in Marvel stories owing to their widespread use in the comics and MCU movies. But