Pollen Lullaby is a uncommon Instant card from Lorwyn (LRW), collector number 36. Current market price: $0.29 (foil $1.24), TCGplayer market prices via Scryfall.
Prevent all combat damage that would be dealt this turn. Clash with an opponent. If you win, creatures that player controls don't untap during the player's next untap step. (Each clashing player reveals the top card of their library, then puts that card on their choice of the top or bottom. A player wins if their card had a greater mana value.)