Dreadship Reef is a uncommon Land card from Commander Anthology Volume II (CM2), collector number 247. Current market price: $0.20, TCGplayer market prices via Scryfall.
{T}: Add {C}. {1}, {T}: Put a storage counter on this land. {1}, Remove X storage counters from this land: Add X mana in any combination of {U} and/or {B}.