The final battle: Trollmarket vs. Angar Rot, and Jim looks to take the next step toward his destiny.
This episode contains examples of the following tropes:
- Affectionate Gesture to the Head: Vendel pats Toby on the head in a genuine show of affection.
- Conveniently Timed Distraction: Right when Angor is about to stab Jim, Claire opens a portal for Toby to charge through Leeroy Jenkins style, distracting Angor just long enough for Jim to make Angor stab himself with his own poisoned knife.
- Eye Scream: A played with example. Angor Rot can remove his eye and remotely control it to spy on Jim and company. Since Jim is protecting him, Strickler tells Jim how to cut the eye down to add to his amulet so it will protect him against Rot's magic. Viewers get no indication Rot can feel it happening, but all other indicators are that he could probably see what was being done until the eye was cut down beyond use as an optic.
- Go Through Me: Vendel and the other Trollhunters stand with Jim when the other trolls want to throw him and Strickler out.
- Heroic Sacrifice: Aargh takes a lethal blow meant for Toby from Angor Rot.
- I'll Kill You!: Toby says this after Angor Rot kills Aargh. Quite fittingly, Claire helps him deliver the final blow.
- In the End, You Are on Your Own: Jim goes to his next fight by himself, with nothing but his grief, guilt and rage to accompany him.
- Insult of Endearment: Vendel pats Toby affectionately and calls him "pudgebag". He is praising Toby at the time, so he means it fondly.
- Pet the Dog: Strickler gives Jim the last stone, as a thanks for Jim letting him leave without a fuss. He also wishes him luck in the battle against Angor Rot, after Jim turns down his offer to fight alongside the Trollhunters.
- Reality Ensues: While Toby placed the gravity curse in the Warhammer so it would become light enough for him to swing around, it's still a curse that makes the gravity of an object randomly change, he struggles to use it when it shifts to being too heavy for him to hold or so light it wants to fly away with him.
- Rule of Three: After finding the third stone, Jim's amulet upgrades his armor accordingly and reveals a new incantation and corresponding power on the amulet: "For the doom of Gunmar, eclipse is mine to command."
- Sealed Good in a Can: Played with. Angar Rot took the souls of every Trollhunter he killed. When Jim, Toby and Claire defeat him, the souls he has held captive for centuries are all freed to return to their brethren in the Void.
- Shoo the Dog: Villainous dog in this case. Jim lets Strickler leave before the final battle with Angor Rot. Strickler is obviously grateful and gives him the final stone.
- Survivor's Guilt: After Aaarrrggh falls in battle against Angar Rot, Jim is told by Kanjigar that a day will come where he'll eventually have to "finish the fight alone" despite his friends making him stronger together. Distraught at the idea of losing anyone else he loves, he decides the next fight must be one he faces without them.
- Taking the Bullet: Aaarrrgghh leaps in front of Rot's poisoned blade, taking a hit intended for Toby, and accelerating his condition to its fatal conclusion.
- "Well Done, Son!" Guy: Kanjigar appears outside the void to usher the stolen Trollhunter souls into the void. But he stops and takes a minute to tell his son Draal that he loves him, regrets pushing him away, and is very proud of him. Draal is clearly touched.
- What You Are in the Dark: Since Barbara has lost her memory, she wouldn't remember breaking up with Strickler due to the whole soul binding. Strickler, even though still having feelings for her, still leaves town because he knows pursuing that relationship would be disrespectful to her wishes.