A new alliance that secretly formed during the chaos of Year 1. Unlike the other alliances, they only desire destruction, not the supremacy of the ideologies of good, evil, law, chaos, or anything else beyond that. They catch wind of the activity in Limbo, and upon learning that the situation could destroy the entire Pantheon, decide to make their debut here as a result.
Tropes applying to them as a whole.
- Big Bad Wannabe: Zigzagged. On the one hand, they fall for the Frame-Up that the GUAM planned for them...but on the other hand, it doesn't change the fact that just as the Pantheon got the GUAL under control, another, even worse alliance popped up and became a threat for the future. It also doesn't help that only a few of their members actually participated, meaning that they didn't have to use a lot, if any, resources.
- Contrasting Sequel Antagonist: When compared to the villains of Year One...there's plenty of differences, like with the GUAM below. While the GUAC and GUAL formed after the widespread and public events of The Great Upheaval and The Pantheonic Rebellion, the GUAD formed in the shadows. While the former two alliances are willing to work with the GUAG and GUAE to some extent, the GUAD desire none of this and will only settle for complete annihilation of the Pantheon and all of reality.
- Enemy Mine: While they don't do this, they do cause others to do it just to stop them.
- Omnicidal Maniac: All of their members, regardless of their reasons, desire complete destruction in some form.
Nekron (DC Comics)The leader of the GUAD. He desires to use the Darkness in Limbo to destroy all of the Pantheon in one go.
- Dark Is Evil: He's a grim-reaper like figure with a dark design and wants to kill everything, yes he's evil!
- One-Hit Kill: Plans to use Limbo to accomplish this.
Acnologia (Fairy Tail)The Black Dragon of the Apocalypse. He's just around to kill things.
- Blood Knight: Those familiar with his home series will not be surprised that he is this here.
- Curb-Stomp Battle: Crushes the Slasher with no effort, and halts the Guardians of the Galaxy and the Aquabats by reducing them to paste.
- I'm a Humanitarian: He was planning on eating Yugi while in his human form.
- Pure Is Not Good: Is a viable candidate for The Keystone of Limbo thanks to his mindset of destruction and killing.
- Nice Job Fixing It, Villain!: His rampage during the riots in Act I gives everyone a concrete and 100% evil enemy to attack and ironically helps end it.
- Spanner in the Works: Subverted, though he comes dangerously close to doing so. Through Darkness and Mirrors would've gone by VERY differently had he successfully absorbed the Keystone of Limbo from Yugi by eating him alive.
Zeref (Fairy Tail)The infamous Black Wizard, who's wondering if the Darkness can do anything for his situation.
- No-Sell: The Curse of Ankhseram makes him immune to the Darkness.
Zamasu (Dragon Ball Super)A fallen Supreme Kai who believes mortals to be the root of all evil, with the actions of the Darkness Proxy serving as further proof to him. Despises the Pantheon for giving mortals what he perceives to be false godhood.
- Dragon-in-Chief: Takes up the role for the GUAD as he delivers "judgement" on the Mirror Pantheon, and figures out how to use the Darkness to destroy both Pantheons.
- The Dreaded: His obsessive mindset and power level are downright terrifying to the heroes and the antagonistic factions.
- Everyone Has Standards: Doesn't like his Mirror Counterpart (Who's based off of his significantly more one-dimensional Manga version) and decides to "Educate" (Read: Kill Him) about the true virtues of justice. Likewise, he's disgusted by the very existence of the Mirror Pantheon, and views letting the Darkness destroy both as poetic justice.
- Eviler Than Thou: He's MUCH more wicked and evil than the forces of Limbo and the Darkness.
- Jumping Off the Slippery Slope: He somehow found a way to jump off of it even more! How, you ask? Zamasu hates the Pantheon for bestowing godhood onto mortals, many of whom come from worlds where gods are not a major factor, and he hates the Mirror Pantheon for housing much of the same riff-raff. How does he react to them? By deciding to work out a plan with the Darkness to destroy both Pantheons for good, erasing them from existence so that they cannot "pollute" creation anymore.
- Knight Templar: Believes that wiping out the mortals masquerading as gods will do the multiverse a grand service...to the point where he's willing to ally with an outer-dimensional sentient darkness in order to accomplish this goal.
- Villain Has a Point: He's not wrong in saying that the actions of the Darkness Proxy and the events leading up to Through Darkness and Mirrors don't give mortals any favors. That being said, he himself is magnitudes worse than them, especially since they were all brainwashed and corrupted, while he turned evil of his own free will, not that he thinks he's evil.
- You Are a Credit to Your Race: Despises mortals and their creations, but for the latter, he gives Skynet a decent amount of approval for his own desire to kill all humans and other organics, applauding the A.I. for trying to end the sins of mortals.
The White (Shin Megami Tensei)Embodiments of despair who desire to end everything.
- Call-Back: Them corrupting several Puella Magi to almost destroy the pantheon before Flynn is forced to slaughter them in "The Great Upheaval" is mentioned.
- Knight of Cerebus: They're a major factor in making the already dark and desperate Act IV even WORSE.
- Would Hurt a Child: If you thought what Yugi did to the Crusaders was bad enough, the mental trauma they place on them makes Yugi's actions look like he was throwing them in a room and pretending to lock it.