When the fourth Oni Mask winds up on Captain Black, the heroes must work to keep him from being corrupted, before he hands the other masks over to the villains.
- Artistic License – Biology: Lampshaded by Jade against Miranda as an insult. She points out that spiders normally secrete silk from their rears and mockingly asks what that says about Miranda's face.
- Back-to-Back Badasses: Will with Jade while fighting the Sumo Khan.
- Bare-Handed Blade Block: A Sumo Khan does this with its fingers when Caleb tries to slice it with his katana.
- Blood from the Mouth: The last strike Oni-Black gives his good counterpart leaves the latter's nose and mouth oozing with blood.
- By the Hair: The Oni Mask-empowered Captain Black grabs Hak Foo by his ponytail and flings him over his shoulder.
- Captured on Purpose: Tarakudo has Wong, Miranda, and Cedric captured so Black will give them the other masks when his fully corrupts him. Phobos even lampshades the genius of it when he realizes what Tarakudo did.
- Car Fu: During the initial fight for the mask, Captain Black uses his van to drive over the Enforcers and ram into Cedric.
- Detect Evil: Jade's abilities let her feel that a Sumo Khan is spying on the group from their shadows.
- Eviler than Thou: When Cedric tries to order Oni-Black around, the latter threatens him, Wong and Miranda into submission by threatening to kill them if they don't assist him in getting Section 13 back under his control.
- For Want Of A Nail:
- Thanks to Yan Lin getting Japanese seaweed from the restaurant, Tohru and Uncle don't have to travel all the way to Japan to get more when the mask-removal potion spills.
- Since Section 13 is no longer stationed in San Francisco, having been moved to Heatherfield to support the Guardians, Tarakudo lays his ambush for Captain Black in an abandoned warehouse instead of Alcatraz. He also has Cedric, Wong and Miranda imprisoned in Section 13 instead of the Enforcers.
- Literally Shattered Lives: After Irma and Hay Lin freeze five Sumo Khan, Captain Black's good half uses the Ox Talisman to shatter them into pieces.
- Mundane Solution: When Japanese seaweed is required for the mask removal potion, Yan Lin reveals that she has some in the Silver Dragon for a new dish, sparing Uncle and Tohru the need to travel all the way to Japan. Before that reveal, Irma suggests that they could just ask for it from a Japanese restaurant.
- Oh, Crap!: Jackie, Caleb and the girls have one when they realize that if the Sumo Khan Mask keeps corrupting Captain Black, the latter might end up handing the other masks over to the villains. They get another one almost immediately afterwards when they notice that one Sumo Khan eavesdropped their entire conversation.
- Play-Along Prisoner: Wong, Cedric and Miranda when they're Captured on Purpose. When the heroes prevent Oni-Black from delivering the Oni Masks to them, Cedric drops the charade and breaks their cell door open.
- Punch Catch: When Hak Foo tries to attack the Sumo Khan, one of them catches his fist before throwing him through the ceiling.
- Tempting Fate: Cornelia asks what's the worst thing that could happen with the Oni Mask-wearing Captain Black while they're waiting for the removal potion, and then everyone has an Oh, Crap! moment when they realize that he can hand the other masks over to the bad guys.
- We Have Reserves: Discussed when Captain Black replaces the Section 13 personnel with the Sumo Khan, as he says that using them to deal with life-threatening tasks is preferable to risking the lives of mortal people. When he asks Caleb if he agrees with that logic, the latter replies that he might if the expandable minions didn't originate from an evil and corrupting source.
- The Worf Effect: A single Sumo Khan is able to easily defeat Hak Foo, despite him being a Dark Chi Warrior who gave the heroes the fight of their lives in the previous chapter.
