Peggy Carter, Secret Agent
The reward here is priced not in mana but in restraint. Swing wide and nothing happens; send one creature into the red zone alone and it becomes indestructible for the rest of the turn. That single-attacker clause does all the work: it asks you to forgo a full team swing in exchange for one threat no blocker can profitably trade with, since damage that would kill it and effects that say "destroy" both bounce off. The grant persisting until end of turn matters most in combat itself, where it lets a lone attacker plow through chump blocks and multi-block gangups intact; it also blanks any opponents' damage-based or destroy-based removal fired off during your attack. This quietly rewires how you sequence a turn: hold the board back, commit one, and dare them to respond before damage. The 2/1 body is almost incidental, because the payoff lives on whatever you choose to send in alone, whether a voltron carrier loaded with auras or a modest creature you simply need to survive a stacked block. And because the trigger reads "a creature you control," she covers herself too: attack with her solo and she keeps her own protection, so she never dead-ends as a body that only enables others. She rewards disciplined, focused aggression over swarming, wanting the solo strike built as a repeatable line you can lean on turn after turn.
