Ice Cave 
Enchantment
$0.74 #21369 0.82 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. (Mana cost includes color.)
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Cards similar to Ice Cave expected a card that isn't here?
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Planar Chaos91%
$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."
Nether Void90%
$673.40↑#16326↑2.18↑32.4 years↑
"Whenever a player casts a spell, counter it unless that player pays ."
."
Chalice of the Void88%
$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."
Vexing Bauble86%
$2.98↑#1297↑0.802.3 years↓
"Whenever a player casts a spell, if no mana was spent to cast it, counter that spell."
Void Mirror86%
$0.39↓#15623↑0.895.5 years↓
"Whenever a player casts a spell, if no colored mana was spent to cast it, counter that spell."
Presence of the Master86%
$0.55↓#26381↓1.30↑32.4 years↑
"Whenever a player casts an enchantment spell, counter it."
Chancellor of the Annex84%
$3.18↑#10165↑1.43↑15.4 years↓
"Whenever an opponent casts a spell, counter it unless that player pays 
."
."
Swindler's Scheme84%
$0.18↓#233910.44↓4.5 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."
Counterbalance84%
$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."
Bazaar of Wonders84%
$2.60↑#28491↓0.38↓30.0 years↑
"Whenever a player casts a spell, counter it if a card with the same name is in a graveyard or a nontoken permanent with the same name is on the battlefield."
Hesitation82%
$0.31↓#233700.60↓28.6 years↑
"When a player casts a spell, sacrifice this enchantment and counter that spell."
Decree of Silence82%
$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."
In the Eye of Chaos82%
$196.62↑#214991.61↑32.4 years↑
"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."
Lunar Force81%
$0.28↓#214520.35↓10.2 years↓
"When an opponent casts a spell, sacrifice this enchantment and counter that spell."
Cephalid Shrine80%
$0.36↓#30496↓0.18↓25.1 years
"Whenever a player casts a spell, counter that spell unless that player pays , where X is the number of cards in all graveyards with the same name as the spell."
, where X is the number of cards in all graveyards with the same name as the spell."
Jace, Unraveler of Secrets79%
$2.73↑#5914↑0.41↓10.5 years↓
"−8: You get an emblem with "Whenever an opponent casts their first spell each turn, counter that spell.""
Boromir, Warden of the Tower78%
$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."
Lavinia, Azorius Renegade78%
$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."
Dovescape76%
$4.96↑#12240↑1.42↑20.5 years↓
"Whenever a player casts a noncreature spell, counter that spell. That player creates X 1/1 white and blue Bird creature tokens with flying, where X is the spell's mana value."
Jetting Glasskite74%
$0.05↓#31218↓0.19↓21.7 years↓
"Whenever this creature becomes the target of a spell or ability for the first time each turn, counter that spell or ability."