Changes

{{episode summary|[[Yuma Tsukumo|Yuma]] and co. take the [[Different Dimension Airship]] to the bottom of the ocean! However, when they end up caught up in a storm, [[Rio Kastle|Rio]] goes missing! [[Reginald Kastle|Reginald]], in search of Rio, is lured to the bottom of the ocean, and what waits there is the ruins Yuma and [[Astral]] were looking for! Reginald is guided by someone to the depths of the Ruin, and what waits there is his sister Rio, being manipulated by [[Abyss (character)|Abyss]], the Spirit of the "[[Number]]"...!}}

[[Abyss (character)|Abyss]] is possessing [[Rio Kastle]].

The following cards appeared in this episode. Cards in italics debuted here.

|effect monsters =

* [[Big Jaws]]

}}

|effect monsters =

* ''[[Gorgonic Gargoyle]]''