Shipwreck Dowser

Merfolk Wizard is the tribe, but the interesting axis is the marriage of two blue engines that usually live in separate decks. Prowess is aggro's clock, rewarding a spell-dense hand by turning every cantrip and burn spell into a temporary pump. Enter-the-battlefield spell recursion is the tempo-and-attrition tool, giving back the Counterspell or removal you already spent. Stapling both onto one body means the same card that wants a graveyard full of instants and sorceries also wants a hand full of them, and the recursion refills exactly the fuel the prowess trigger burns. The result is a value creature that folds back into itself: it returns a spell, you cast that spell, it grows. What keeps the loop from being oppressive is the shape of the recursion, a one-time enter trigger rather than an activated engine, so the payoff is front-loaded and finite unless you find a way to blink or rebuy the creature. At five mana for a 3/3, the body is not the pitch; the free card and the prowess platform are. This is top-end for a spellslinger deck, the sort that turns late-game topdecks into two-for-ones by arriving with a card already in hand and a growing threat attached.