Lavinia, Azorius Renegade 
Legendary Creature — Human Soldier
$0.18 #3183 0.91 7.6 years
Each opponent can't cast noncreature spells with mana value greater than the number of lands that player controls.
Whenever an opponent casts a spell, if no mana was spent to cast it, counter that spell.
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"Whenever a player casts a spell, if no mana was spent to cast it, counter that spell."
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"Whenever a player casts a spell, if no colored mana was spent to cast it, counter that spell."
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"Noncreature spells with mana value 4 or greater can't be cast."
Sanctum Prelate78%
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"Noncreature spells with mana value equal to the chosen number can't be cast."
Ice Cave78%
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"Whenever a player casts a spell, any other player may pay that spell's mana cost. If a player does, counter the spell."
Planar Chaos76%
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"Whenever a player casts a spell, that player flips a coin. If they lose the flip, counter that spell."
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"Whenever an opponent casts a spell, you may reveal the top card of your library. If you do, counter that spell if it has the same mana value as the revealed card."
Lunar Force74%
$0.25↑#21116↓0.22↓10.1 years↑
"When an opponent casts a spell, sacrifice this enchantment and counter that spell."
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$2.86↑#10169↓0.80↓15.3 years↑
"Whenever an opponent casts a spell, counter it unless that player pays 
."
."
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"Counter target spell if no mana was spent to cast it."
Chalice of the Void72%
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"Whenever a player casts a spell with mana value equal to the number of charge counters on this artifact, counter that spell."
Decree of Silence72%
$29.75↑#11514↓1.15↑23.3 years↑
"Whenever an opponent casts a spell, counter that spell and put a depletion counter on this enchantment. If there are three or more depletion counters on this enchantment, sacrifice it."
Swindler's Scheme70%
$0.16↓#23086↓0.21↓4.4 years↓
"Whenever an opponent casts a spell from their hand, you may reveal the top card of your library. If it shares a card type with that spell, counter that spell and that opponent may cast the revealed card without paying its mana cost."
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"Whenever the first noncreature spell of a turn is cast, counter that spell."
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"Whenever a player casts an instant spell, counter it unless that player pays 
, where X is its mana value."
, where X is its mana value."
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$519.01↑#16171↓2.23↑32.3 years↑
"Whenever a player casts a spell, counter it unless that player pays 
."
."
The Frightful Four70%
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"Whenever an opponent casts their first noncreature spell each turn, that player loses life equal to that spell's mana value."
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"−8: You get an emblem with "Whenever an opponent casts their first spell each turn, counter that spell.""