"Number 4: Stealth Kragen" Rating Score by シエスタ

Jellyfish senpai's false No. that left various impressive scenes.
Since water is specified as the material, it will be mainly operated in water. With the appearance of Ice Knight and Sea Nettle that appeared in the same pack, it will be easy to summon water with more general-purpose deployment cards.
Although it has a strong effect against water, it is easy to use regardless of the opponent due to the effect of 1.
Depending on the opponent, the attribute change is an effect that can affect it, and it can be expected to play an active role as a combo card. The removal is also fricche and doesn't target, and it's perfect if you can compensate for your own low RBI with Burn.
Also, effects 1 and 2 don't even use X materials, so they can be used even from non-regular summons and resurrections.
Furthermore, even if it is destroyed, it can remain as long as it has the materials. When its successor, Ephyra, is destroyed, it can revive Stealth Kragen, so it has a high ability to maintain the front line.
It's easy to line up multiple Xyz monsters, so you can aim to summon the future emperor, and you can also use your own card effects to activate it, so you can aim for self-destruction.
It's an X with an excellent effect that matches the material restraint.