The idea is to grab two packs, shuffle them together, and play immediately
If youve ever wanted to play the villain, Sephiroth, Fabled SOLDIER is your chance
Paying 3 for Negate isn't great either
However a few do have "practical" uses - here are some examples: The particular card you reference, Garruk the Slayer, was created for the Magic 2015 prerelease and is used in a variant where one player plays normally and the other plays as Garruk
These are the booster packs to make it easier for players to choose which pack to buy and reduce inventory issues for smaller stores
The contents of Azurite Sea were revealed two months ahead of its arrival which hopefully means we'll find it more about it this month, maybe after the Moana 2 promo comes to an end.