Tribute to Urborg is a common Instant card from Dominaria United (DMU), collector number 113. Current market price: $0.11 (foil $0.14), TCGplayer market prices via Scryfall.
Kicker {1}{U} (You may pay an additional {1}{U} as you cast this spell.) Target creature gets -2/-2 until end of turn. If this spell was kicked, that creature gets an additional -1/-1 until end of turn for each instant and sorcery card in your graveyard.