Equilibrium Adept

Flurry needs a second spell each turn, and the entry trigger quietly supplies the fuel: exiling the top of your library hands you something to cast that was never in your opening grip, which is what lets you reach spell number two on the same turn and switch on double strike. That alignment is the whole design. This is not a body that draws value and swings for damage as separate jobs; the card it digs up is the thing that arms the attack. The exiled card carries a short leash, playable only through your following turn, which pressures you to spend it now rather than hoard it, and spending it now is precisely what feeds the payoff. A 2/4 with double strike lands like a 4/4 across one combat step, and the defensive toughness lets it survive the exchange to swing again next turn. Left alone as a solitary threat, the double strike never fires and the impulse card rots in exile. Slotted into a shell of cheap spells that chain a second cast, it becomes a repeatable four-power attacker that pays for the spells keeping it live.