Captain America, Unbowed

Flash on a protective effect is what makes this design tick, because most tribal board-defense is stapled to sorcery-speed creatures that land on your own turn, telegraphing the play and inviting a wrath before they matter. Here the protection is a combat trick and a counter-response in one: hold up four mana, let an opponent commit to a sweeper or a big alpha strike, then drop the creature at instant speed and blank the removal for a turn. The indestructible clause reaches Soldiers and Heroes specifically, a narrower net than a general anthem but a deliberate one, tying the card to a token-and-heroes go-wide shell rather than any white board. A 3/4 shrugs off most burn already, but the price tag pays for the flash trigger, not the stat line. Where Heroic Intervention protects everything more cheaply and does nothing else, this pairs the shield with a permanent that stays on the battlefield and keeps blocking, which changes how you sequence a defensive turn. You are not spending a card to survive a sweep; you are developing your board and surviving it in the same action, and the flash window is what lets you do both reactively instead of committing first.