We know it’s going to be a different kind of episode when we begin with the Robo-Goddess in her realm, which has taken on the stark monochromatic aesthetic of the OP (which remains my favorite of the Fall). It seems the World’s Finest Assassin is her latest and possibly last best hope against the Hero ending the world.
Back on that world, her champion Lugh is ready to burn Dia’s house down and whisk her away with the story that she committed suicide so that none of the sides in the war could have her. There’s just one problem: Setanta MacNess has arrived with Gae Bolg, and partially demolishes the castle before Lugh can implement his plan.
Lugh deflects Gae Bolg’s attack with one of his “grenades”, then launches the biggest cannon attack he has. Setanta survives the blast with some superficial wounds that soon heal, but the knight is amazed at having finally seen and tasted his own blood, goes into Berserk mode while maintaining his sense, and challenges Lugh to a duel.
Suspecting Setanta is indeed the Hero as Maha’s intelligence suggested, Lugh makes it clear to Dia that he can’t run from Setanta’s challenge, nor can he have a hope of winning a duel against him. That said, Lugh also reminds Dia he’s neither knight nor hero, but an assassin. Assassinating’s all he can do, and it’s all he will do against Setanta.
After a little trash talking and negotiating of the terms of the duel, Lugh gets Setanta to agree that the duel will begin when a coin he flips into the air hits the ground. This essentially locks Setanta’s gaze on the coin, so he doesn’t look up when a solid tungsten missile comes crashing down on top of him, causing an enormous explosion and shock wave.
That solid tungsten missle was initially casually launched into orbit while Lugh was still in Dia’s castle, but is the culmination of months of careful preparation and collaboration. He and Dia designed the spells to launch it, and he and Tarte scouted the island Maha found to test it. It even employes the same shielding Tarte used to help Lugh conserve his energy on the way to Dia. The name of the spell is Gungnir, which is fitting as Odin’s spear is believed to be the prototype of Cúchulainn’s Gae Bolg.
Lugh’s extremely aerospace-y and not necessarily assassin-y or knightly gambit pays off. He takes a considerable lick himself, but soon awakens to a concerned Dia, whom he’s so relieved is okay he kisses her just as the sun rises over the mountains. When Dia asks why he agreed to take on a non-Tuatha Dé matter, Lugh tells her he never forgot his promise to always come running.
As he promised Tarte, Lugh arrives home having failed his first assassination job ever yet still triumphant, because he brought Dia with him. Cian decides its best for now for Dia’s identity to be concealed; she’s to live with them in Tuatha Dé as Lugh’s younger sister, with her shared bloodlines with Esri making it a believable lie.
With that settled, Cian brings up another order of business: the Hero has apparently arrived in the Alvan Kingdom. Lugh’s confused by that, since he assumed Setanta was the Hero. Alas, he apparently wasn’t; the actual Hero, whose presence closely precedes the certain arrival of the Demon Lord, is one Lord Epona Rhiannon, and the close-up on his alternate-Lugh like visage is the last image we see in The World’s Finest Assassin.
Despite the fact there’s no immediate news of a second season, I can’t believe we won’t be getting one sometime down the road. There’s a lot of story left to tell and a lot of cute moments between Lugh/Dia, Lugh/Tarte, Lugh/Maha, or any other combinations therein. Not to mention…what if this Epona lad is just like Lugh: originally from another world?
That’s one of dozens of questions I’m hoping a sequel would explore. Until then, this was a bold ending to a thoroughly enjoyable and engrossing isekai series.