As for our mechanical friends that introduce Prototype with The Brothers War, there are 18 in total (four mythics, three rares, six uncommons, and four commons) and appear in all five colors, so youve got your pick of options
Captain America, First Avenger comes with two abilities - a Catch ability that allows the player to attach a target Equipment to Captain America and a Throw ability that Unattaches that Equipment and deals out damage equal to its mana cost
At least one copy of Splendid Genesis emerged on the market and asks for $50,000
Your deck might win by sacrificing little token creatures for an incremental advantage, or by playing the largest monsters available and trampling your opponent into the dust
If the average price somehow increased to $3, it would be profitable to just crack boxes (and even more profitable than usual because there's no risk or variance, since the basic land is guaranteed in every pack)