Mutilate 
Sorcery
$1.25 #2397 0.36 24.6 years
All creatures get -1/-1 until end of turn for each Swamp you control.
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Cards similar to Mutilate expected a card that isn't here?
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Quag Sickness92%
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"Enchanted creature gets -1/-1 for each Swamp you control."
Defile88%
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"Target creature gets -1/-1 until end of turn for each Swamp you control."
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"All creatures get -1/-1 until end of turn for each basic land type among lands you control."
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$0.38↓#11461↓0.06↓26.6 years↑
"All creatures get -2/-2 until end of turn."
Drag to the Bottom80%
$0.06↓#21276↓0.07↓4.0 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."
Languish80%
$0.34↓#5680↓0.19↓11.1 years↓
"All creatures get -4/-4 until end of turn."
Infest80%
$0.13↓#21635↓0.05↓23.9 years
"All creatures get -2/-2 until end of turn."
Nausea80%
$0.03↓#17556↓0.00↓28.2 years↑
"All creatures get -1/-1 until end of turn."
Shrivel80%
$0.10↓#18243↓0.24↓16.4 years↓
"All creatures get -1/-1 until end of turn."
Blight Grenade79%
$0.38↓#12213↓0.05↓3.9 years↓
"All creatures get -3/-3 until end of turn."
Night of Souls' Betrayal77%
$2.02↑#10440↓0.91↑21.9 years↓
"All creatures get -1/-1."
Toxic Deluge76%
$4.49↑#67↑0.87↑12.8 years↓
"All creatures get -X/-X until end of turn."
Dead of Winter76%
$0.35↓#10456↓0.70↑7.2 years↓
"All nonsnow creatures get -X/-X until end of turn, where X is the number of snow permanents you control."
Kaervek, the Spiteful76%
$0.28↓#9999↓0.386.2 years↓
"Other creatures get -1/-1."
Mephitic Vapors75%
$0.11↓#20591↓0.367.9 years↓
"All creatures get -1/-1 until end of turn."
Rollick of Abandon74%
$0.04↓#29699↓0.2912.3 years↓
"All creatures get +2/-2 until end of turn."
Hazardous Conditions74%
$0.05↓#28718↓0.389.9 years↓
"Creatures with no counters on them get -2/-2 until end of turn."
Liliana of the Dark Realms74%
$7.23↑#21400.3214.1 years↓
"−3: Target creature gets +X/+X or -X/-X until end of turn, where X is the number of Swamps you control."
Hideous Laughter73%
$0.20↓#25202↓0.3021.9 years↓
"All creatures get -2/-2 until end of turn."
Terror Tide73%
$0.26↓#6795↓0.342.8 years↓
"All creatures get -X/-X until end of turn, where X is the number of permanent cards in your graveyard."