Your opponent reveals the card and shuffles it into their deck
It comes from the 1996 Pokemon Card set, card number 44
Decklist 2 Ertai Resurrected 4 Sheoldred, the Apocalypse 4 Raffine, Scheming Seer 2 Lord Skitter, Sewer King 4 Thalia, Guardian of Thraben 4 Dennick, Pious Apprentice 2 Rona, Herald of Invasion 3 Faerie Mastermind 4 Skrelv, Defector Mite 3 Go for the Throat 1 Make Disappear 4 Plaza of Heroes 3 Otawara, Soaring City 4 Seachrome Coast 2 Eiganjo, Seat of the Empire 4 Caves of Koilos 1 Swamp 2 Shipwreck Marsh 1 Shattered Sanctum 2 Takenuma, Abandoned Mire 4 Darkslick Shores Sideboard 2 Ao, the Dawn Sky 1 Blot Out 2 Disdainful Stroke 1 Negate 4 Cut Down 1 Surge of Salvation 4 Wedding Announcement Deck Notes What even needs to be said here
If you play lots of cards with low mana values, that means you'll reliably have something to cast in all stages of the game