As for the back side, it could be argued that it is easier to transform back into Ojer Pakpatiq, but you do have a mandatory wait of three mana activations to do so without outside help
Second, because they can make any mana colour they can be great for getting cards on the board that you just dont have the lands to support, meaning a deck built around them doesnt need to worry if a card outside of its main colours is useful to have
These are intended as entry-level products for new players to engage with Commander, although recent trends have been pushing these precons into more complicated territory
You can never go wrong with a Brainstorm, Serra Angel is an iconic card, Progenitus just rocks, and Emrakul is a much-needed reprint
Adding double strike to tokens can also be a great way to win a game if you build your deck around making powerful tokens, like Angels
In terms of card quality, you'll bump into the following: Near Mint Lightly Played Moderately Played Heavily Played Damaged Buying a "Near Mint" quality card from TCGplayer does not mean that it will grade a PSA or CGC 10