Opening packs is not a very good idea : When you have tradable packs, opening them comes with a risk
Cephalid Breakfast is another good example of a deck that uses cards like Dread Return and actively tries to combo opponents via the graveyard, yet still retains strong midrange and fair-game plans when graveyard access is shut down
Lastly, its worth noting that Pokmon has released many special, extra-rare, and promotional cards over the years
Advisor costs the same as many mana rocks, loves Spellbook Vendor for its role tokens as bargain bin auras, and draws cards almost as well as an enchantress
Greens creatures are where you see some of the shrinkage more, as theres not a pure green creature with power 6 or more, and large common creatures are smaller than in most sets before you get to the Artifacts with prototype that are essentially partially green