Mono-White Aggro floods the board with cheap creatures and gains life through Lunarch Veteran and Lembas-adjacent cards, then threatens to go wide with Battle Screech tokens and pump effects like Guardians' Pledge and Ramosian Rally. Drown in Sorrow is your best answer, sweeping most of their board at sorcery speed before they can pump in response. Duress comes in to strip Prismatic Strands, which is their primary protection against mass removal and can single-handedly win them a game you had locked up. Nihil Spellbomb is dead in this matchup, Tragic Slip is conditional and poorly positioned against a wide board, and Tithing Blade is too slow to matter against their aggressive curve. Pestilence is your long-game engine here — once established, it invalidates their entire strategy, so protecting it is the main priority post-board.