Minds Dilation 5UU Enchantment Whenever an opponent casts his or her first spell each turn, that player exiles the top card of his or her library
The answer varies dramatically by era and card type
Secret Lair x Dungeons & Dragons: Whispers in Candlekeep Counterspell (1.6 million decks, too many specials to list) Dragonborn Champion (36k decks, EA $10) Klauth, Unrivaled Ancient (2k as Commander, 55k as card, EA $30) Miirym, Sentinel Wyrm (25k as Commander, #18 over last 2 years, plus 65k as card, Showcase foil $7) Now this is a Secret Lair
That doesn't mean they're not my favorites 10) Peter, Paul & Mary 9) Sex, Drugs & Rock n' Roll 8) Winkin, Blinkin & Nod 7) Beg, Borrow & Steal 6) Tom, Dick & Harry 5) Larry, Darryl & My Other Brother Darryl 4) Dewey, Cheatem & Howe 3) Larry, Moe & Curly 2) Truth, Justice & The American Way 1) Blood, Sweat & Tears As a columnist, I'm very receptive to feedback, both good and bad