Dead of Winter 

Sorcery
$0.36 #10759 0.11 7.4 years
All nonsnow creatures get -X/-X until end of turn, where X is the number of snow permanents you control.
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Cards similar to Dead of Winter expected a card that isn't here?
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Planar Despair86%
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"All creatures get -1/-1 until end of turn for each basic land type among lands you control."
Drag to the Bottom80%
$0.12↓#21670↓0.22↑4.1 years↓
"Each creature gets -X/-X until end of turn, where X is 1 plus the number of basic land types among lands you control."
Hazardous Conditions80%
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"Creatures with no counters on them get -2/-2 until end of turn."
Priest of the Haunted Edge80%
$0.14↓#14946↓0.00↓5.7 years↓
"
, Sacrifice this creature: Target creature gets -X/-X until end of turn, where X is the number of snow lands you control. Activate only as a sorcery."
Terror Tide76%
$0.28↓#7104↑0.172.9 years↓
"All creatures get -X/-X until end of turn, where X is the number of permanent cards in your graveyard."
Mutilate75%
$0.24↓#2395↑0.39↑24.7 years↑
"All creatures get -1/-1 until end of turn for each Swamp you control."