When attempts to contact the recently deceased Waletta fail, Adashino swiftly declares Wills as the culprit, since he stood to gain the most from her death. Lord El-Melloi II contents—quite reasonably—that in the world of mages, it doesn’t matter who does something or how, because both of those things can be controlled via magecraft. Rather, it’s the why that matters most.
Since the storm has not ended the original agreement is still in place; Adashino will allow Lord El-Melloi to continue his investigations. He hires Shishigou Kairi to assist him, but as Kairi and Gray collect reference materials, they are attacked by a Black Dog—the final form of the lightning outside—that punches right through Adashino’s Bounded Field.
This incident not only confirms the “murder weapons” used in the string of killings, but piques Shishigou’s interest in Gray, and why the Black Dog seemed to fear her Mystic Code. With her okay, El-Melloi explains that the code is Rhongomyniad, the spear of King Arthur (Arturia), disguised and sealed by both Add and its scythe form. He calls Gray “a portrait of King Arthur created by a certain family.”
The Arthur connection confirms it for Kairi and El-Melloi: the storm of lightning, wind, and spirits surrounding the workshop is the legendary Wild Hunt, once led by Arthur, but which led to defeat and his departure to Avalon. El-Melloi bids that the others indulge him in carrying out a ritual to test his new hypothosis.
Using Wills Mystic Eyes (with Reines’ as a catalyst), El-Melloi is able to summon a fairy in the flesh—the same one that has been appearing before Wills as if to warn of an impending death. The fairy can speak, and admits that she herself killed Trevor as punishment for essentially disrupting the balance between worlds for his own selfish desire to build an army of “false fairies” (i.e. Black Dogs) that he can command.
Now El-Melloi has the “why” as well as the ultimate means: the Marburry Workshop itself being the murder weapon with its ability to summon the murderous Black Dogs.
In his shortsightedness, El-Melloi’s demonstrative ritual ended up activating that weapon, sending an entire army of Black Dogs (led by one large boss-sized one) at the mansion. Adashino stays inside to protect Reines while the others head out to meet the dogs of war in glorious battle.
And I have to say, despite it being a bit dark, it’s quite a battle to behold. Wills shows his prowess with mystic daggers, Kairi has a mystical shotgun, and even El-Melloi pops off a few magical bullets, if you will. But obviously the battle’s MVP was always going to be Gray, taking care of business with her scythe and saving El-Melloi from a premature end.
Ultimately Gray must rescind the second seal and unleash the true power of Rhongomyniad in order to defeat the boss. It’s a hauntingly beautiful sequence, as her “Lance that Shines to the Ends of the World” not only obliterates the boss but blasts away the storm clouds as well. Gray may only be a “portrait” (her name perhaps a reference to Dorian as well as her main color) but she can still bring it when called upon.
What her attack does not do is close the gate to the fairy realm from which the Black Dogs first emerged. To do that, Wills decides to do something he always suspected he’d had to do: walk through the gate himself. El-Melloi begs him not to go as it would be a one-way journey, but Wills is prepared, and knows that not only will he not really “die”, but that his father and Waletta are waiting for him there.
With the gate—and case—closed (and El-Melloi’s favor to Sophia-Ri fulfilled), all that’s left is to head back to London. But before parting ways, Adashino hands the lord some material she found in the aftermath relating to the origin of Wills’ Mystic Eyes, with which he wasn’t born as El-Melloi assumed. They were acquired via Rail Zeppelin, a legendary phantom train that buys and sells the eyes.
With part of the lengthy show title now in play things look to only get more interesting as Lord El-Melloi’s case files continue to flow. Meanwhile, before parting with Gray Kairi tells her to keep a close eye on El-Melloi, since he senses the former Waver to still have a strong connection to his now-dead servant. Since connections to the dead only draw people backwards into the past, it’s on Gray to ensure El-Melloi resists that pull and keeps moving forward.