Niblis of Dusk

Prowess wants an evasive body, and this one delivers on the premise: a flier already connects, so every noncreature spell you cast turns an incidental swing into a real clock. The 2/1 frame is the tell. Toughness of one means this was never meant to block or trade; it exists to be the thing an opponent has to answer before it grows out of burn range. Cast a single cantrip and it hits for 3 in the air; chain two cheap spells and the damage stacks up fast. That fragility is what pays for the design: a two-power flier with prowess that could survive combat or a removal spell would be priced well above three mana, so the body stays thin enough that any point of damage or a bounce spell erases a turn of pumping. It belongs to the strain of spell-driven aggressive blue creatures that turn a hand full of noncreature spells into pressure, where the creature is less a threat in itself than a way to convert everything else you were casting anyway into face damage. The reward scales with the deck around it, not with the card in isolation.