You have so many different creatures at your disposal, and most will come with some sort of mechanics attached, such as Reach, Vigilance, Deathtouch, Menace, or Trample, while others are token generators
Each booster contains two cards from the Retro Artifacts bonus sheet, which comes with vintage artifacts in old frames, and you have a small chance (less than 1%) of finding a serialized schematic for staples like Mox Amber or Wurmcoil Engine
It is rare for a deck to use only one color
Solphim, Mayhem Dominus is probably the worst in the cycle, mainly because it only doubles non-combat damage
(2/5/2021) If an effect causes a creature with changeling to lose all abilities, it will remain all creature types, even though it will no longer have changeling
Pour the mana secured by mana rocks or Ultima into Gogo, and trigger Yuffie's ability multiple times to drain your opponents' life all at once