Once More with Feeling is a rare Sorcery card from Unglued (UGL), collector number 11. Current market price: $0.90, TCGplayer market prices via Scryfall.
Exile all permanents and all cards from all graveyards. Each player shuffles their hand into their library, then draws seven cards. Each player's life total becomes 10. Exile Once More with Feeling. DCI ruling — A deck can have only one card named Once More with Feeling.