Tegan Jovanka

The Doctor's companion mechanic is a partner variant with a hard constraint: it pairs only with a commander that is the Doctor, funneling the whole design toward a two-headed leadership built around a legendary Time Lord. What Brave Heart contributes to that pairing is a repeatable combat trigger that keys off historic, and that word is doing quiet work. Historic is a batching term for artifacts, legendaries, and Sagas, and in a deck fronted by a legendary Doctor nearly every creature you want to attack with is legendary, with any attacking artifact creature qualifying too. So the "target attacking historic creature" clause is far less restrictive than it reads in isolation. The ability fires on every declaration of attackers, handing out a +1/+1 and indestructible until end of turn, which recasts a 2/2 body as a support piece rather than a threat: it protects your best attacker through blocks and through board wipes cast inside the combat step, all resolving during the attack trigger's window rather than waiting on a spell you have to hold up. The flavor lands cleanly, a companion who steadies the person swinging the biggest weapon rather than swinging it herself. Taken as a standalone Human, the stat line is unremarkable; taken as one half of a Doctor's companion pair, it is an every-attack shield-and-buff that rewards a battlefield dense with legends, exactly the texture such a deck already wants to build.