Pure Intentions is a rare Instant — Arcane card from Saviors of Kamigawa (SOK), collector number 25. Current market price: $0.29 (foil $1.71), TCGplayer market prices via Scryfall.
Whenever a spell or ability an opponent controls causes you to discard cards this turn, return those cards from your graveyard to your hand. When a spell or ability an opponent controls causes you to discard this card, return this card from your graveyard to your hand at the beginning of the next end step.