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{T}: Add {U}. If you played a land this turn, add {B} instead.
Abilities, attacks, weakness & resistance
Other cards from Doctor Who
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River of Tears (WHO-509, Rare) is a land from the Doctor Who set that can produce blue mana. If you have played a land this turn, tapping it produces black instead, offering color flexibility based on land drops. Its conditional production makes it useful in decks that can reliably play a land each turn to access both blue and black mana sources.
Catalog pricing data as of 20 May 2026, 20:26
