Hidden Cataract
Land — Cave
This land enters tapped.
{T}: Add {U}.
{4}{U}, {T}, Sacrifice this land: Discover 4. Activate only as a sorcery. (Exile cards from the top of your library until you exile a nonland card with mana value 4 or less. Cast it without paying its mana cost or put it into your hand. Put the rest on the bottom in a random order.)
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Cards that do something similar expected a card that isn't here?
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The Surgical Bay 84%
$0.23#8949
"{1}{U}, {T}, Sacrifice this land: Draw a card."
+2 more matching lines
Reef Roads 83%
$0.17#11793
"{1}{U}, {T}, Sacrifice this land: Create a 1/1 colorless Pilot creature token with "This token saddles Mounts and crews Vehicles as though its power were 2 greater." Activate only as a sorcery."
+1 more matching line