Leona originally says that Azul’s unique magic “enables the caster to take one power from a target if that target signs the scroll,” but later in Book 3 he realizes he was wrong: Azul’s UM “sucks EVERY power out of someone if it’s not channeled through a contract,” with the contracts “acting “like a filter that limits his magic’s effects,” as Azul’s own unique magic is too powerful for him to control, as confirmed by Jade.
Leona refers to it as “taboo magic” that compels those who breach his contracts to obey Azul’s every command, and when he takes power(s) from a contractee they become available for Azul to use as he pleases.
Jack says “that means he’s cheating at everything,” but Ruggie says Azul isn’t cheating: his unique magic is simply, “crazy high-level.”
While the English-language adaptation of the game generally uses the word “power” to describe what it is that Azul takes, the original word is 「能力」, which is closer to “ability.” In addition to taking magic Azul also takes someone’s athletic ability in the lead-up to his overblot, for example: his unique magic is not limited to use on mages.
It seems that Azul taking all the abilities and/or powers out of a person causes them to collapse.
Unlike other unique magics that we have heard of, it seems that Azul intentionally designed his UM in order to enact revenge on people who bullied him. What might be the earliest results of Azul’s unique magic are described by middle-school Jade and Floyd, who talk about a mermaid losing weight and getting a girlfriend but losing their “fine tenor,” and another getting “silky-smooth, gorgeous blonde” hair but losing “the big tailfin they used to dart through the water.”
Azul uses his unique magic in Book 4, granting Floyd a deep voice in exchange for Floyd’s own unique magic, that he uses to thwart Jamil.
“It’s a Deal” comes up again during Glorious Masquerade when Deuce injures himself saving Idia from a falling chandelier. Azul says, “Normally l’d hold off on doing this, but since we’re not on campus…” and receives Deuce’s unique magic, “Be the Limit,” in exchange for the promise to “hit (Rollo) where it hurts.”
Azul absorbs a strong attack from Rollo in order to charge Deuce’s UM, leading Rollo to believe that he sacrificed himself to protect Idia and Malleus, but Idia explains, “This is Azul Ashengrotto we’re talking about—a guy whose whole brand is about being greedy, miserly, underhanded, and ruthless. There’s a less than zero chance he would ever sacrifice himself for nothing,” at which point Azul unleashes the force of Deuce’s UM on Rollo.
Azul also uses his unique magic in Book 7 in order to defeat the mermaid of darkness populating his dream.
It is a little unclear if Azul actually uses his unique magic on the prefect in Book 3: while the prefect does sign a contract Azul does not invite his spell, and he also does not remove a talent or power from the prefect as collateral, possibly rendering the spell unnecessary. We see this in a similarly vague situation with Vil, where Azul has Vil sign a contract and provide him with poisonous plants in exchange for a moisturizer, but he does not take a talent/magical power and never invokes his spell, so his unique magic was possibly not used.
During Glorious Masquerade, Jamil teases Azul by saying, “I doubt a certain someone could get plants to sign a contract for his signature spell” in order for Azul to be able to use his UM on the firelotuses, but as we see in Book 3 Azul does not actually need anyone to sign anything at all: his UM can be used without his target’s consent. Whether or not this means that Azul could take “abilities” from things like plants if he so chose is maybe unclear.
Azul uses his unique magic on 225 students in Book 3, fighting off his unhappy contractees with multiple kinds of magics that were possibly the same spells he took from the contractees themselves.
The contracts seem to “deflect” any attacks angled for them, with Azul claiming that “an official contract is completely unbreakable, regardless of how many bodies you throw at it” and “No magic can harm this document in any way.”
Leona’s response to hearing about the situation, however, is to shred the contracts, with Ruggie pointing out that Azul possibly provided the “on-the-spot demonstration” of “invulnerability” as a bluff. Jack’s group sneaks into Azul’s VIP room to try and destroy a contract that Azul leaves out on his desk, but it electrocutes them. Azul claims that the contracts are “rigged to jolt anyone who touches them aside from (himself),” but this is proven to be a lie: based on the logic that Azul would not need to keep the contracts in a vault if they were untouchable, Leona and Ruggie attempt and succeed at smuggling Azul’s entire collection out of Octavinelle.
Leona guesses that the contracts were “impervious to damage only under specific conditions. Namely, either being in the VIP room, or being in (Azul’s) hands.”
Leona shredding Azul’s collection of contracts instigates his overblot, but Azul destroys contracts on his own during Book 4 and Glorious Masquerade without seeming to suffer any consequences.
Twisted Wonderland Reference Note 