Abyss-scale of Mizuchi

For those who haven't read it before, here is it:

LTGY-JP064

Abyss-scale of Mizuchi

Equip Spell Card

Equip only to a "Mermail" monster. It gains 800 ATK. When a Spell effect that was activated on your opponent's side of the field resolves, negate that effect, then send this card to the Graveyard.

Recently this card is a new tech in OCG Mermail (oh nobody care about it, Ophion > Mermail lol). People just assume this card is bad because this card MUST be chained to the first spell from your opponent. So your opponent can just bait out Mizuchi using a dead spell. However this fact can change if you hold it back and grind until it's needed, like how you save Solemn Judgment for the last out of your foe. You can't set Judgment without any real reasons, same deal with Mizuchi. However, I believe that Mizuchi is in the same category as Judgment: "win more" cards. When you are in bad situation, neither Judgment nor Mizuchi can save you.

800 attack boost is nice too, since Megalo at 3200 attack can kill pretty everything.