Auras are placed on another permanent, most often creatures and lands, and augment them in certain ways
However, unlike chess, MTG's emergent strategy is somewhat forced by the printing of these sets -- building out the options for a player which the community will find, as a hive mind, the best ones
SILUMGAR, DRIFTING DEATH Silumgar saw extensive play in Tarkirs first Standard outing, with its peak of popularity at the 2015 World Championships, where it saw extensive play in Esper Dragons
For example, if you control Thundermane Dragon ("You may cast creature spells with power 4 or greater from the top of your library.") and Twinmaw Stormbrood is on top of your library, you can cast Twinmaw Stormbrood, but not Charring Bite
But seriously, even though the Future Sight border shenanigans clearly make the cards a bit more desirable, Mystery Booster 2 feels like a 'purer' product
Incapsula incident ID: 48000200157921157-266515047276086544