Nullstone Gargoyle 
Artifact Creature — Gargoyle
$2.76 #14738 1.11 20.9 years
Flying
Whenever the first noncreature spell of a turn is cast, counter that spell.
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Cards similar to Nullstone Gargoyle expected a card that isn't here?
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Dovescape82%
$5.08↑#120611.2120.3 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."
Permission Denied78%
$16.61↑#4308↑0.91↓2.8 years↓
"Counter target noncreature spell. Your opponents can't cast noncreature spells this turn."
Negate74%
$0.15↓#56↑0.40↓18.6 years↓
"Counter target noncreature spell."
Stronghold Machinist74%
$0.22↓#21345↓0.11↓26.6 years↑
"
, 
, Discard a card: Counter target noncreature spell."
, , Discard a card: Counter target noncreature spell."
Ice Cave74%
$0.77↓#21126↓0.92↓25.3 years↑
"Whenever a player casts a spell, any other player may pay that spell's mana cost. If a player does, counter the spell."
Null Brooch72%
$6.54↑#144200.29↓28.2 years↑
"
, , Discard your hand: Counter target noncreature spell."
, , Discard your hand: Counter target noncreature spell."
Scatter Arc71%
$0.11↓#21561↓0.20↓13.6 years↓
"Counter target noncreature spell."
Lavinia, Azorius Renegade70%
$0.18↓#3183↑0.91↓7.6 years↓
"Whenever an opponent casts a spell, if no mana was spent to cast it, counter that spell."
Dovin's Veto70%
$2.15↓#239↑0.70↓7.3 years↓
"Counter target noncreature spell."
Planar Chaos70%
$2.31↓#7147↑1.41↑24.3 years↑
"Whenever a player casts a spell, that player flips a coin. If they lose the flip, counter that spell."