Many Assassins have various keyword abilities such as menace, which makes them not only harder to block, but more likely to take out your opponents, especially if their life total hits 10 for Ezio Auditore da Firenze to make them lose the game with its triggered ability
The companions all have mono-color casting costs or are colorless, potentially adding a third color to your Commander deck as each of the Doctors has a dual-color casting cost
That's a steep drop-off from the $175 price tag on release, but this is where it's bottomed out
With your Moltres EX up front (it's a Basic, so you can play it immediately), spam Inferno Dance while Mewtwo EX powers up and Gardevoir goes through its three-stage evolution
And, of course, the movies are immensely popular as well