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* This is one of the [[cover card is ]]s of ''[[Duelist Pack: Kastle Siblings]]''. * This monster appears in the only artwork of "[[Legendary Number39: Utopia Rising]]" to share its .** This monster's silhouette appears in the artwork of "[[Number ruinsXyz Revive Splash]] with another "Legendary Number. * The number "73"is located on this monster's right thigh plate.

* This card's effect is inverse of its has a "Legendary [[NumberC]]" counterpart, [[Card evolutions|upgraded]] form: "[[Number 94C73: Crystal ZeroAbyss Supra Splash]]".

* This card and its has a "Legendary Number[[Shark (archetype)|Shark]]" counterpart, "Number 94: Crystal Zero" are similar in the sense both are [[WATERAbyss Shark]], [[Warrior-Type]], [[Rank 5 Monster Cards]] that require 2 level 5 WATER monsters as Xyz material, with a combined ATK and DEF total of 3800".

* "[[Number]]" monsters often take the form reflecting their owners and/or their original desires. In this case, this [[Mythyrian Number]] represents this card's original owner, [[Reginald Kastle|Nash]], and its [[Number Guardian|"Number" Guardian]], [[Abyss (character)|Abyss]].** This card's Japanese name, "Roaring Waterfall Deity", reflects how Abyss served as the ocean god in the ''[[Yu-Gi-Oh! ZEXAL]]'' anime.** This card is a [[counterpart]] to "[[Number 94: Crystalzero]]", a fellow Mythyrian Number belonging to Nash's sister, [[Rio Kastle|Marin]].*** Both cards share the same [[Attribute]] ([[WATER]]), [[Rank]] (5), and [[Type]] ([[Warrior]]).*** Both cards' [[ATK]]-based effects are complete opposite compared opposites of each other; in this card's case, it doubles its own ATK.**** In {{episode|ZEXAL|109|ref}}, "[[Number 94: Crystalzero (anime)|Number 94: Crystalzero]]" used its effect to repeatedly halve the rest ATK of [[Number 73: Abyss Splash (ZEXALanime)|this card]] and destroy it in battle. This reflects how [[Number 94: Crystalzero (character)|Crystalzero]] was Summoned to counter Abyss's attack on the [[United Lands of the Poseidon Ocean]] deck, which focuses on ATK point losswhile under [[Vector]]'s control.

* This card's number is the first opposite of that of "[[Legendary Number37: Hope Woven Dragon Spider Shark]]" that has a "Number C" form. The first is "** Both cards were used by [[Reginald Kastle]]/[[Ryoga Kamishiro (manga)|Ryoga Kamishiro]] in the ''Yu-Gi-Oh! ZEXAL'' anime and [[Number 65: Djinn BusterYu-Gi-Oh! ZEXAL (manga)|manga]]", respectively.