Lunar Force 
Enchantment
$0.28 #21452 0.35 10.2 years
When an opponent casts a spell, sacrifice this enchantment and counter that spell.
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Cards similar to Lunar Force expected a card that isn't here?
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Hesitation90%
$0.31↑#233700.60↑28.6 years↑
"When a player casts a spell, sacrifice this enchantment and counter that spell."
Decree of Silence84%
$21.71↑#11742↑1.16↑23.4 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."
Ice Cave81%
$0.74↑#213690.82↑25.4 years↑
"Whenever a player casts a spell, any other player may pay that spell's mana cost. If a player does, counter the spell."
Chancellor of the Annex80%
$3.18↑#10165↑1.43↑15.4 years↑
"Whenever an opponent casts a spell, counter it unless that player pays 
."
."
Planar Chaos79%
$2.33↑#7172↑1.35↑24.4 years↑
"Whenever a player casts a spell, that player flips a coin. If they lose the flip, counter that spell."
Counterbalance78%
$2.51↑#3414↑1.00↑20.2 years↑
"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."
Straw Golem77%
$0.15↓#30399↓0.00↓29.4 years↑
"When an opponent casts a creature spell, sacrifice this creature."
Boromir, Warden of the Tower75%
$4.45↑#874↑0.64↑3.3 years↓
"Whenever an opponent casts a spell, if no mana was spent to cast it, counter that spell."
Jace, Unraveler of Secrets75%
$2.73↑#5914↑0.4110.5 years
"−8: You get an emblem with "Whenever an opponent casts their first spell each turn, counter that spell.""
Swindler's Scheme74%
$0.18↓#233910.444.5 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."
Nether Void74%
$673.40↑#16326↑2.18↑32.4 years↑
"Whenever a player casts a spell, counter it unless that player pays 
."
."
Lavinia, Azorius Renegade74%
$0.27↓#3214↑1.10↑7.7 years↓
"Whenever an opponent casts a spell, if no mana was spent to cast it, counter that spell."
Vexing Bauble74%
$2.98↑#1297↑0.80↑2.3 years↓
"Whenever a player casts a spell, if no mana was spent to cast it, counter that spell."
Presence of the Master72%
$0.55↑#26381↓1.30↑32.4 years↑
"Whenever a player casts an enchantment spell, counter it."
Chalice of the Void72%
$16.39↑#9424↑1.14↑23.0 years↑
"Whenever a player casts a spell with mana value equal to the number of charge counters on this artifact, counter that spell."
Mogg Sentry71%
$0.32↑#226260.12↓25.7 years↑
"Whenever an opponent casts a spell, this creature gets +2/+2 until end of turn."
Void Mirror70%
$0.39↑#15623↑0.89↑5.5 years↓
"Whenever a player casts a spell, if no colored mana was spent to cast it, counter that spell."