Rain of Filth 
Instant
$5.45 #3278 0.43 27.9 years
Until end of turn, lands you control gain "Sacrifice this land: Add ."
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Cards similar to Rain of Filth expected a card that isn't here?
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Mana Seism82%
$0.21↓#21698↓0.22↓21.9 years↓
"Sacrifice any number of lands, then add that much 
."
."
Overlaid Terrain72%
$2.01↓#20397↓0.06↓26.6 years↓
"Lands you control have "
: Add two mana of any one color.""
: Add two mana of any one color.""
Divergent Growth71%
$0.12↓#26498↓0.00↓23.3 years↓
"Until end of turn, lands you control gain ": Add one mana of any color.""
: Add one mana of any color.""
Pyretic Ritual70%
$5.98↑#743↑0.32↓16.1 years↓
"Add 
."
."