mtg all cards with madness Madness in MTG: Rules, History, and Best Cards

While a similar card would be printed in Secret Lair later on, this is the only one printed in that frame and with that foiling, making it very rare, and worth up to $250

Good luck dealing with that

A Legendary Gift for Magic Fans: Whether expanding a growing collection or surprising a longtime Magic player, Reign of Dragons delivers epic gameplay, stunning fantasy artwork, and the excitement of commanding an unstoppable Dragon army

It hasn't been widely used in EDH decks, and there are only a few cards with the keyword

Cards like Nykthos Paragon can make your board state get out of control rather quickly and help end the game