River Delta is a rare Land card from Ice Age (ICE), collector number 359. Current market price: $0.89, TCGplayer market prices via Scryfall.
This land doesn't untap during your untap step if it has a depletion counter on it. At the beginning of your upkeep, remove a depletion counter from this land. {T}: Add {U} or {B}. Put a depletion counter on this land.