WARNING: The following article contains spoilers for Dark Nights: Death Metal #6 by Scott Snyder, Greg Capullo, Jonathan Glapion, and Tom Napolitano, on sale now.
If Superman represents hope and Batman represents justice, then Wonder Woman represents truth. This is proven by her signature weapon, the Lasso of Truth. Armed with a wide variety of powers and even more varied origins, the lasso has been by Wonder Woman's side for her entire career and has proven its use every time. But in Dark Nights: Death Metal #6, when all hope seems lost on the edge of creation, Wonder Woman found a way to use her trusted lasso to empower all of her friends.
With the Batman Who Laughs now the sole god of the DC Multiverse, Wonder Woman led her friends in a latch ditch effort to stop him. Heading to the Forge of Creation, Diana intended to build a machine capable of unleashing the Anti-Crisis energy they would need to fix reality. Or more accurately, restore every part of their collective history, good and bad. Her journey was fraught with dangers and when Lex Luthor's blueprints for the machine were lost, Wonder Woman despaired that all hope was lost.
That is, until she remembered exactly what it was she was trying to do. As she had recently learned, Crisis energy tempted a person to make one, single moment matter and is powered by selfishness and ambition. Anti-Crisis energy was the exact opposite of this. It calls upon everything and everyone, making every moment and person, no matter how small or seemingly insignificant, matter. By accepting the truth that they are all connected as part of one epic story, and have the power to defeat a god. Realizing this, Diana knew that she never needed a machine to connect all of her friends and allies, but that she had the perfect item to get this done. Dipping her lasso down into the forge, it became the literal connecting strand between the heroes of the DC Universe, undoing the knots that the Crisis Energy had created in favor of a reality where the truth reigned supreme.
The Lasso of Truth made its debut in Sensation Comics #6 by William Moulton Marston and Harry G. Peter. Back then, the lasso was created from Aphrodite's Magic Girdle. Marston, who also invented the lie detector, used the lasso as an allegory for feminine charm, before its powers would become literal. In Post-Crisis DC, the lasso was forged by Hephaestus from the Golden Girdle of Gaea and just as its origins changed, so too did its powers.
The lasso could always extract the truth from people, but it could even force entire crowds to speak the truth, but this muted its ability a little, making it less effective and its effect did not end at human beings. During her long career, Diana has discovered that the lasso can even affect gods, helping them to come to terms with their own inner turmoil or sealing their souls to prevent them from threatening the world. Diana has even used the lasso as a way to locate her lost friends.
But the most impressive power that the lasso has demonstrated was the ability to connect to other people. Diana demonstrated its ability to connect individuals to establish not only communication, but also emotional clarity, to make intentions known, and allow for true feelings and opinions to be shared. Now this power has been dispersed on a never before seen scale, empowering every hero (and odd villain) of the DC Universe for one last battle to save all of existence.