![Underground River [The Brothers' War: Prerelease Promos] - La Boîte Mystère ( The Mystery Box)](http://laboitemystere.com/cdn/shop/products/eec550b9-12c4-5c2f-8e2c-691c5afaaa10_1aec7b22-72eb-4989-87c8-76ec9f600d28.jpg?v=1692542840&width=1946)
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Magic: The Gathering
Underground River [The Brothers' War: Prerelease Promos]
Underground River [The Brothers' War: Prerelease Promos]
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| Set: | The Brothers' War: Prerelease Promos |
| Type: | Land |
| Rarity: | Rare |
{T}: Add {C}.
{T}: Add {U} or {B}. Underground River deals 1 damage to you.
{T}: Add {U} or {B}. Underground River deals 1 damage to you.
"The war polluted the land, turning what had once been fruitful fields into fetid morasses of mud and rusted corpses."
—*The Antiquities War*
![Underground River [The Brothers' War: Prerelease Promos] - La Boîte Mystère ( The Mystery Box)](http://laboitemystere.com/cdn/shop/products/eec550b9-12c4-5c2f-8e2c-691c5afaaa10_1aec7b22-72eb-4989-87c8-76ec9f600d28.jpg?v=1692542840&width=1445)