The game is played on battlegrounds, and there are four battlegrounds for players to choose from : The Encounter (Easy), A Dark Realm (Normal), The Lair (Hard), and Infinite Wrath (Extreme)
"With cards brighter than a vintage marquee and tough enough for the wasteland, Secret Lair's Rad Superdrop brings Fallout's retro-future characters straight to your Magic collection," the official page reads
Altar of Dementia gives you self-mill to fill your graveyard, and mill as a win condition
Since Y'shtola repeatedly damages each opponent, cards that trigger off noncombat damage such as Curiosity, Ophidian Eye, Tandem Lookout, Helm of the Ghastlord, and Sigil of Sleep are powerhouses that quickly take over the game
He also just works with any and all other card draw in the game, like Friends On The Other Side, Let the Storm Rage On, Maleficent - Sorceress, etc
This means indirect damage (cards that say player loses x life) count towards this objective