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
Liliana Vess allows the player to force their opponent to discard cards, allows them to search their library for a specific card, and can return all creatures in both player's graveyards to the battlefield under their control, flooding the board with creatures for a huge swing, which will often lead to the end of the game
Its cascade ability will trigger while its on the stack, causing you to cascade
Blasphemous Act To live is a sin Finally, we have one of the greatest mass removal spells in Magic: The Gathering: Blasphemous Act
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)