For those that dont know, a gacha games pity system allows players to guarantee a particular character or item if they have failed to pull it through normal means
I've seen some MTGO decklists that were clearly intending to use it with Baral, Chief of Compliance and Accumulated Knowledge (in a roundabout way, achieving a virtual Regrowth on Ancestral Recall, which is pretty good, albeit situational)
Sovereign Okinec Ahau lets you do just that thanks to his very unique ability
See the full ranking in the Best cards section above
Blasphemous Act To live is a sin Finally, we have one of the greatest mass removal spells in Magic: The Gathering: Blasphemous Act
These two articles talk a lot about mechanics and themes, but innovative structures are also a key component to R&D's design evolution