If someone casts this against me mid-combat, not only wont I be Ready, I also wont be Willing to accept the consequences

Academy Elite Academy Journeymage Academy Loremaster Academy Researchers Acererak the Archlich Adeliz, the Cinder Wind Adrix and Nev, Twincasters Aegar, the Freezing Flame Aegis Sculptor Aerie Mystics Aether Channeler Alabaster Mage Alandra, Sky Dreamer Alania's Pathmaker Alania, Divergent Storm Alchemist's Apprentice Alisaie Leveilleur Alphinaud Leveilleur Ambassador Laquatus Ambitious Augmenter Aminatou, Veil Piercer Amphin Pathmage Ana Battlemage Ana Disciple Anarchist Anathemancer Aphetto Alchemist Aphetto Exterminator Aphetto Grifter Aphetto Runecaster Apprentice Necromancer Apprentice Sorcerer Apprentice Wizard Araumi of the Dead Tide Arbiter of Knollridge Arcane Artisan Arcane Investigator Arcane Proxy Arcane Savant Arcanis the Omnipotent Archaeomancer Archaeomender Archetype of Imagination Architects of Will Archive Dragon Archive Haunt Archivist Archmage Emeritus Archmage of Echoes Archmage of Runes Arctic Aven Ardent Electromancer Arjun, the Shifting Flame Armorer Guildmage Artful Looter Artisan of Forms Ascended Lawmage Ashiok's Adept Ashiok's Forerunner Ashling, Rimebound Asmoranomardicadaistinaculdacar Asylum Visitor Atmosphere Surgeon Augur of Bolas Augur of Skulls Augury Adept Auramancer Auratouched Mage Auriok Windwalker Avalanche Caller Aven Augur Aven Fateshaper

(You look at the top card of your library
There aren't actually any rulings about how the player must perform the shuffle, meaning that they could theoretically conceal their shuffling completely and turn your opponent's blocking into a complete guessing game as opposed to trying to follow the shuffle around which might have been the intention of the card