This is an obvious attempt to get Paladin to play murloc decks other than OTK. I like it. Having your hero power have synergy with your Warleaders and Seers is extremely powerful. Its also a 1 mana 1/3 murloc itself so that alone might be enough to run 2 of it.
If there are other good Murloc support cards in this set this card could be the core of a new murloc paladin archetype.
Assuming this isn't an April Fools thing, I wish the card had been a Shaman card. It would have really helped make Murloc Shaman a thing, and in Pally as good as it is it doen't synergize well with anyfin. That being said, I like the card a lot.