Breezer of Quick Waters

Bestow {2}{u}{u} (If you cast this card for its bestow
cost, it's an Aura spell with enchant creature.
It becomes a creature again if it's not attached to a creature.)
Breezer of Quick Waters or enchanted creature
can't be blocked.
Enchanted creature gets: "Whenever another
Merfolk enters the battlefield under your
control, it gets +1/+1 until end of turn"