Soul Barrier 
Enchantment
$0.29 #17733 0.55 31.3 years
Whenever an opponent casts a creature spell, this enchantment deals 2 damage to that player unless they pay .
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"Whenever an opponent casts a spell, this creature deals 2 damage to that player."
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"Whenever an opponent casts a noncreature spell, you may draw a card unless that player pays 
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"Whenever an opponent casts a spell, that player sacrifices a permanent of their choice unless they pay ."
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"Whenever a player casts a spell, this enchantment deals 2 damage to that player."
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"Whenever an opponent casts a spell, counter it unless that player pays ."
."
Aether Barrier75%
$5.69↑#144221.07↑26.6 years↓
"Whenever a player casts a creature spell, that player sacrifices a permanent of their choice unless they pay ."
."
Pyrostatic Pillar74%
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"Whenever a player casts a spell with mana value 3 or less, this enchantment deals 2 damage to that player."
Esper Sentinel74%
$56.06↑#78↑1.67↑5.3 years↓
"Whenever an opponent casts their first noncreature spell each turn, draw a card unless that player pays 
, where X is this creature's power."
, where X is this creature's power."
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Nether Void72%
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"Whenever a player casts a spell, counter it unless that player pays 
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"When an opponent casts a creature spell, sacrifice this creature."
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"At the beginning of your upkeep, for each player, this enchantment deals 1 damage to that player unless they pay 
or ."
or ."
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"Whenever an opponent casts their first noncreature spell each turn, this enchantment deals 2 damage to that player."
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Unifying Theory70%
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"Whenever a player casts a spell, that player may pay . If the player does, they draw a card."
. If the player does, they draw a card."
Cindervines70%
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"Whenever an opponent casts a noncreature spell, this enchantment deals 1 damage to that player."