Beetle, Legacy Criminal

The graveyard ability is the whole point of the design, and it rewards a second look. A 3/3 flier for four mana is unremarkable on rate, but this card is built to die and cash out once: after it hits the yard, it converts blue's stingiest mana into a single burst of counter-plus-evasion, exiling itself to hand a +1/+1 counter and flying to whatever creature needs to close. The self-exile is what keeps this honest; the effect fires exactly once, so the payoff is a one-shot graduation rather than an engine, and you spend it on the creature that most needs to break through. The sorcery-speed restriction closes the door on any combat-trick reading: you commit on your own turn, during your main phase, so the buff is planned rather than sprung. What makes the two halves cohere is that they want the same board state. The body pressures early; when it trades or chumps, its second life delivers a permanent counter and a keyword to a body you intend to attack with, so the growth arrives on an evasive axis instead of just adding raw stats. That structure (a creature whose afterlife is worth more than its front-of-card body) is a familiar blue move for wringing value from a spent threat, but the flying grant is the wrinkle: it does not merely enlarge a creature, it makes the enlargement matter, delivered by a card that costs only mana to redeem, never a re-cast.