YMMV / Yu-Gi-Oh! World Legacy

• Complete Monster: Lee, the World Chalice Fairy, was originally a scientist studying the World Key, an artifact of unimaginable power. Lee decided to use it to awaken the power at the planet's core, which would allow her to become a god. The act nearly destroyed the world, and wiped out most life on it. Though she was killed in the aftermath, Lee bound her soul to the created World Chalice. Much later, Lee came across three heroes, Ib, Ningirsu, and Auram, and their pet dragon, and convinced them to gather the World Legacy artifacts that were created as a part of the World Key's activation. At first seeming benevolent, she reveals her true colors in front of Ib, and takes control of her body. Though defeated when Ib regained control, Ib was forced to kill herself in the process. When Ningirsu tried to revive Ib, it was revealed that Lee survived in the robot Ningirsu created for Ib's soul. Lee then seemingly destroyed Ib's soul, all while attempting to become a god once again, not caring about the world being destroyed.
• Crossover Ship: Mekk Knight Crusadia Avramax gets paired up with I:P Masquerena because their effects perfectly line-up meta-wise. There's even a ton of fan art for this pairing on pixiv.
• Memetic Mutation: Check THIS out!^Explanation The OCG flavor text for Mekk-Knight Avram consists of two allegorical sentences that foreshadows future developments in the story and sets the tone for what to expect; the TCG version of his flavor text instead consists of three words that tell nothing about the story. Due to how ridiculous this localized flavor text is, it has become a meme in the community and the crowning example for lazy/bad TCG localization.
• Never Live It Down: Ningirsu has gained the reputation of being a siscon among various Yu-Gi-Oh communities when his motivations to revive his dead sister at all costs endanger the world again and lead to Lee's resurrection again.
• Spiritual Adaptation: The World Legacy shares many themes with Xenoblade Chronicles 1. They both have inspiration from Gnosticism, as well as a villain who goes from Mad Scientist to Godhood Seeker and later acts as a Manipulative Bastard to the heroes.