Battershield Warrior

Static anthems reward parking: hold Glorious Anthem up and the buff is always on, so the cheapest way to protect it is to leave your creatures home. This design inverts that pressure. The team-wide +1/+1 is gated behind boast, which means the ability can only be paid for once this 2/2 has already swung, turning the pump into a reward for aggression rather than a reason to sit behind it. The buff expires at cleanup, so there is no accumulating advantage to defend across turns: each activation is a fresh burst of combat math bought on the turn you spend the mana, refreshed whenever you keep attacking. That structure asks for a wide, flat board underneath it, a mass of small bodies or tokens that a single anthem pulse can turn into a real clock. It also carries a real vulnerability. The 2/2 has to survive to attack again for the engine to keep running, so a defender willing to trade shuts the payoff off at the source. Left unanswered in a stall, though, it forces the opponent to re-solve every attack step, doing an anthem's work as a curve-topping aggressor while sidestepping the passive, sit-back play pattern anthems usually encourage. Boast is what welds the effect to commitment: the ability is only unlockable after a declared attack, so you cannot bank the pump on defense, only cash it in on the swing.