Snake Pit 
Enchantment
$0.28 #14073 0.12 27.0 years
Whenever an opponent casts a blue or black spell, you may create a 1/1 green Snake creature token.
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Cards similar to Snake Pit expected a card that isn't here?
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Eyes of the Wisent95%
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"Whenever an opponent casts a blue spell during your turn, you may create a 4/4 green Elemental creature token."
Mold Adder89%
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"Whenever an opponent casts a blue or black spell, you may put a +1/+1 counter on this creature."
Witchstalker88%
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"Whenever an opponent casts a blue or black spell during your turn, put a +1/+1 counter on this creature."
Freyalise's Charm85%
$0.16↓#29946↓0.35↑31.4 years↑
"Whenever an opponent casts a black spell, you may pay . If you do, you draw a card."
. If you do, you draw a card."
Dragonlair Spider84%
$0.49↑#8367↑0.31↑14.4 years↓
"Whenever an opponent casts a spell, create a 1/1 green Insect creature token."
Demon's Horn78%
$0.21↓#6565↑0.1222.7 years↓
"Whenever a player casts a black spell, you may gain 1 life."
Kraken's Eye78%
$0.10↓#156760.0522.7 years↓
"Whenever a player casts a blue spell, you may gain 1 life."
Sol'kanar the Swamp King78%
$0.17↓#20022↓0.1232.4 years↑
"Whenever a player casts a black spell, you gain 1 life."
Crystal Rod78%
$0.14↓#26801↓0.00↓33.2 years↑
"Whenever a player casts a blue spell, you may pay 
. If you do, you gain 1 life."
. If you do, you gain 1 life."
Throne of Bone76%
$0.16↓#24594↓0.0633.2 years↑
"Whenever a player casts a black spell, you may pay . If you do, you gain 1 life."
. If you do, you gain 1 life."
Warmth74%
$1.18↑#28530↓0.1929.0 years↑
"Whenever an opponent casts a red spell, you gain 2 life."
Karplusan Strider72%
$0.05↓#31035↓0.39↑20.2 years↓
"This creature can't be the target of blue or black spells."
Great Sable Stag72%
$0.34↑#24096↓0.1917.3 years↓
"Protection from blue and from black"
Howling Moon72%
$2.28↑#5615↑0.00↓4.9 years↓
"Whenever an opponent casts their second spell each turn, create a 2/2 green Wolf creature token."
Autumn's Veil72%
$0.60↑#3162↑0.40↑16.3 years↓
"Spells you control can't be countered by blue or black spells this turn, and creatures you control can't be the targets of blue or black spells this turn."
March of the World Ooze71%
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"Whenever an opponent casts a spell, if it's not their turn, you create a 3/3 green Elephant creature token."
Display of Dominance71%
$0.07↓#23679↓0.2111.6 years↓
"• Permanents you control can't be the targets of blue or black spells your opponents control this turn."
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$0.32↑#31913↓0.1426.0 years
"Destroy target blue or black creature with flying."
Bog Gnarr70%
$0.13↓#32081↓0.00↓25.4 years↓
"Whenever a player casts a black spell, this creature gets +2/+2 until end of turn."
Infested Roothold70%
$0.26↓#23270↓0.22↑22.7 years↓
"Whenever an opponent casts an artifact spell, you may create a 1/1 green Insect creature token."