Kenessos, Priest of Thassa

Two abilities that look unrelated until you build around them: a passive scry booster and a green-blue engine for cheating the ocean's largest creatures into play. The scry replacement is the quieter half, and the one that tells you what this Merfolk is for. Every scry you cast turns up one extra card of selection, so any deck already running scry effects (a temple entering, a scry-tacked-on burn spell, a dedicated library manipulator) gets to see further ahead. That matters most because the activated ability lives on that very same card you just arranged: pay the cost, look at what's on deck, and if it is a Kraken, Leviathan, Octopus, or Serpent, put it into play for free. The scry then does double duty, letting you set up the payoff before you spend the mana rather than gambling blind. The small static ability exists to make the flashy one land consistently, which explains why this reads as unremarkable in a vacuum and pointed the moment a deck is stuffed with tentacled fatties. Note the direction of the engine: the sea monster has to be sitting one card deep in your library, not in your hand, so drawing your Leviathan is the failure state, not the reward. This belongs to a familiar tradition of legends built to anchor a creature-type payoff deck rather than to headline it. The 1/3 body stays out of combat and out of the way; its whole job is skipping the ocean's crushing mana costs.