If you're unfamiliar with populate, you create a copy of a token you control, which works well if you have a giant tree-folk token you've just made
Generally, cards peak when they are released and then, as sealed product is opened by collectors, players, and sellers, the value falls as more becomes available
Cocks only qualified his acclaim slightly by mentioning that Universes Beyond Commander sets, composed of four preconstructed decks that players can slap on the table right out of the box, tend to sell a bit below MTGs overall premiere sets, such as the recent Outlaws of Thunder Junction
Where Urzas Saga really shines, though, is with its ability to tutor for an Artifact in chapter III