Season 1
- Someone killed Phobos and Elyon's parents and not only left no evidence, but framed Phobos extremely thoroughly.
- Jade turning into the Queen again, partially because this time she's fully aware of what's going on and is having a panic attack after summoning the Shadowkhan and siccing them on Uriah, and partially because it's implied that Jade is fully aware of what the Queen does after taking full control.
- When Phobos learns that Tarakudo's plans with the Queen ended up making Jade a Guardian, he threatens the Oni King with the dissolution of their alliance. This pisses off said Oni so much that he proves himself Eviler than Thou by using his Psychic Powers to restrain the Prince and calmly promise him unspeakable torment if he ever threatens him again, making Phobos experience true fear for one of the first times in his life.
- Oni-Black threatens to kill Cedric, Wong, and Miranda to force them into obedience.
- Hak Foo is insanely powerful as a Dark Chi warrior, and shows no qualms about trying to kill the Guardians and their allies.
- Apparently one can just buy a "Japanese encyclopedia of evil" on Amazon.
- In "Fright Night Fight", Irma controls Wong's sweat (a result of being close to Taranee's fire) to go after the dark wizard's eyes.
- Oni-Chris tries to kill Paco when he catches the latter using the Ox Talisman in their duel, with the Oni then proceeding to take over his body altogether.
- "The Seal of Phobos" reveals that Wong plans to take Elyon's powers for himself, use that power to steal the power of the Heart of Kandrakar, then force Tarakudo to submit with said power, allowing him to use the nine Shadowkhan tribes as an army to conquer not just Earth and Meridian, but every other realm as well, then throw Elyon, Phobos, and the heroes into the Shadow Realm for eternity.
- Alchemy puts on one half of the Crab Khan mask to gain an advantage against Oni-Valmont, and shortly afterwards, the mask begins to corrupt her.
- When Hak Foo crashes into Cavigor like a meteor, it's made clear that some of the defeated guards were killed by the impact blast.
- Wong and Cedric ruin the attempt to make peace between Phobos and the rebellion, which was genuine in this universe, all thanks to Tarakudo's manipulations. He then reveals the duo's actions to Phobos to manipulate him further into their alliance.
- Irma sends Cedric into a horde of alligators that try to eat him.
- Hak Foo was already bad enough as a regular Dark Chi Warrior, but once he gets the Mini-Khan mask, he becomes even stronger, impossible as that seems.
- After Hak Foo loses his mask, Jade poofs him by cutting his head off with a shadow-katana.
- Wong eventually makes a deal with Shendu; the former will redirect the ritual to steal Elyon's powers so that it instead returns Shendu to life, allowing him a chance for revenge on Jackie. In exchange, Shendu is to teach Wong how to control the Shadowkhan without a mask so he can control all the tribes at once.
- It's made clear that War Is Hell after the failed castle assault is over, with over two hundred rebels dead before Elyon intervenes (which is this in and of itself In-Universe, as Jade notes).
- Tynar's injuries are more explicit here, with a giant thorn going through his shoulder.
- Krampus is a demon who devours the souls of children corrupted by negative emotions... and also their bodies, for good measure. He's also huge and powerful enough to give the Guardians a hard time.
- Cedric manages to wear the Mantis Mask, which is a similar situation to Hak Foo.
- The idea of Shendu being resurrected utterly terrifies the Chans, with the Guardians also being scared just from what they've heard of him. As Finn puts it, the other villains are bad enough, but Shendu's presence makes things apocalyptic.
- Wong successfully resurrects Shendu, not just with the Heart of Meridian but also managing to fuse the powers of the Talismans into him as well. And then to make things even worse, he absorbs the Mask of Tarakudo, giving him control of all nine Shadowkhan tribes as well.
- As a demonstration of his powers, Shendu easily overpowers Cedric, breaking first his hands, then his arms, then tosses him through a wall. And finally, Shendu incinerates him, leaving nothing but a charred skeleton.
Season 2
- Drago threatens to burn Cornelia, Irma, and Hay Lin alive if Taranee doesn't bring Will and Jade to the cave without the Heart.
- Apparently beings like Shendu and his siblings can just spontaneously form out of evil energies.
- Drago proves himself as a much more violent leader of the Knights of Vengeance than Raythor in canon, slashing a captive Drake's face for no reason other than his own amusement and setting a trap for the Guardians that involves sealing them in a canyon with a fire fueled by toxic chemicals that create poisonous smoke.
- The clash of Hay Lin's powers and the Tracker's new Demon Chi abilities creates a tornado behind Sheffield, and if the Knight had escaped it could have devastated Heatherfield.
- Drago implies that he's hoping that getting the Guardians and their powers exposed would lead to them ending up on a dissection table.
- We get a reminder of just how dangerous Bai Tza was, with Jade telling the Guardians of her plan to trigger the San Andreas fault and send San Francisco into the sea. Tohru even says that she's arguably the most dangerous Demon Sorcerer after Tso Lan and Shendu himself. And then Miranda gets her chi...
- Thanks to Drago being the one to animate them here, the Annihilators have claws and spiked spines on their back.
- After Drago finds out that Jade's Anti-Magic abilities can destroy the Annihilators, he sets out to stop her while ordering his remaining troops to level the city and leave no survivors as a distraction to the fight.
- If the Guardians absorb any of the Demon Chis, even one that matches their own element, the interaction could corrupt their Auramere, and maybe even damage the Heart itself.
- In Jade and Will's first shared dream, Shendu possesses Jackie, kills everyone they love, and destroys the Heart. Oh, and Drago comes out of Shendu's mouth.
- In Cornelia's nightmare, she's forced to watch a Water Demon Chi empowered Miranda drown Caleb.
- During Irma and Cornelia's shared dream, Drago makes Irma's mouth disappear.
- When going after the Sky Demon Chi in Salem, Drago takes advantage of the unique conditions in order to summon up the vengeful spirits of those who were put to death as "witches" to attack the heroes, and it's appropriately horrifying.
- Drago and Nerissa successfully steal the walking stick belonging to the Ben-Shui chosen one, allowing them to further their plans for Jade.
- In addition to his canon victims, Drago manages to hypnotize both Jade and Jackie, two of the most dangerous members of the heroes.
- Hak Foo uses the Thunder Demon powers he gets to attack Irma, who has made a water giant of herself around her, leaving her with first degree burns over most of her body.
- Hak Foo starts to take on more of the Thunder Demon's personality the longer he holds his Demon Chi, to the point that the other Knights are somewhat worried.
- Nerissa gives Will's Astral drop both her powers and Jade's as an experiment, but she also starts to ingratiate herself to Susan...
- Not only does Drago mock Will over Jewel's demise, but he threatens to do the same to Matt just to taunt her.
- Drago infects Taranee with Shendu's chi, and as Uncle warned, the mixture of powers quickly proves volatile. She goes berserk and starts attacking everyone, and worse, The Corruption starts spreading to the others, threatening to overwhelm their Aurameres completely and destroy the Heart.
- And even after the chi is removed, Drago manages to steal and escape with it, meaning it can be used again.
- Drago uses his Quintessence power and Dragon's Teeth to free Shendu from his prison... and the heroes brought all the Talismans to Meridian to stop Phobos...
- Nerissa's plan to eliminate evil would have everyone's minds rendered unable to think of anything negative.
- The villains go after Taranee, and the other Guardians only narrowly manage to save her from being eaten by Shendu.
- In addition to Matt and Huggles, Jackie and Scruffy also get Reforged into a Minion, using the power of both the Heart of Meridian and the Tiger Talisman to do so. Scruffy gets turned into a werewolf-like figure called Baskerville, while Jackie becomes a knight called Mordred.
- Section 13 is completely destroyed by Shendu, while the villains escape with not just the Talismans, but also Tarakudo's mask and the Pan'ku Box, the latter of which they intend to use to free the Demon Sorcerers. And worse, Nerissa has plans for Will's mom as well.
