Gaining protection from everything causes a spell or ability on the stack to have an illegal target if it targets you
Mutational Advantage, seeing its first printing in the original Fallout set, is worth about $4.50 thanks to being one of the best boardwipe protection spell for counters-based decks

Synthoids Aminatou, Veil Piercer Ancestral Knowledge Brainstone Brainstorm Brainsurge Broodspinner Candlestick Cavalier of Gales Cephalid Inkmage Cerebral Download Citywatch Sphinx Clandestine Work Consuming Ashes Contingency Plan Corroding Dragonstorm Cruel Truths Curate Dazzling Lights Deadly Visit Diabolic Vision Dimir Informant Diresight Discovery // Dispersal Dogged Detective Don't Make a Sound Doom Whisperer Doomsday Dream Eater Ephara's Dispersal Failed Conversion Fangkeeper's Familiar Found Footage Goblin Recruiter Grim Bauble Grim Flayer Harmonized Trio Hidetsugu and Kairi House Guildmage Imperious Inkmage Jace, the Mind Sculptor Kishla Village Kroble, Envoy of the Bog Lightshell Duo Lim-Dl's Vault Lydia Frye Master of Death Mephitic Vapors Mission Briefing Munda, Ambush Leader Muse's Encouragement Naga Oracle Namazu Trader Neutralize the Guards Notion Rain Orcish Librarian Otherworldly Gaze Pile On Plan the Heist Price of Fame Psychic Whorl Reinforcements Risky Research Riverwise Augur Rowan's Grim Search Rubblebelt Maverick Scroll Rack Spellgyre Spider-Man Noir Starbreach Whale

CR COLLECTOR'S RARE R Rare Chaos Emperor Dragon - Envoy of the End X DARK Level 8 [ DragonEffect ] ATK 3000 DEF 2500 Cannot be Normal Summoned/Set
Its typological transformation from Normal to Normal/Fairy in Generation VI added depth to its battle potential and lore
It works the best in control decks that react to their opponents