Captain America rewards playing Hero-subtyped creatures by granting them vigilance and haste and distributing +1/+1 counters
Sure, its just a movie or show
Where its at its best is on turn one helping you cast a ton of mana rocks, your Tymna, or a Rhystic Study, or slightly later, maybe on turn three, where it helps you double or triple spell some of your most impactful (but more expensive) cards
There are three card pack types that have been discontinued and replaced in an effort to streamline the purchase process for players
Symmetry Matrix is a much more subtle card, as we have to plan out how we spend our mana
Using the Sword with Mulan Charging Ahead to pick off Ward characters your opponent wont exert makes it a really good tool