Guttural Response 
Instant
$1.33 #8885 0.24 18.5 years
Counter target blue instant spell.
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Burnout94%
$1.61↑#12476↓0.00↓30.4 years↑
"Counter target instant spell if it's blue."
Gainsay92%
$0.07↓#24243↓0.07↓25.7 years↑
"Counter target blue spell."
Dispel86%
$0.32↓#953↑0.3316.7 years↓
"Counter target instant spell."
Red Elemental Blast84%
$2.36↑#450↑0.51↑33.2 years↑
"• Counter target blue spell."
Pyroblast83%
$8.81↑#479↑0.41↑31.4 years↑
"• Counter target spell if it's blue."
Flash Counter80%
$0.29↓#18342↓0.2932.4 years↑
"Counter target instant spell."
Bant Charm75%
$0.30↓#5092↑0.2518.0 years
"• Counter target instant spell."
Muddle the Mixture71%
$2.04↑#710↑0.49↑21.0 years↑
"Counter target instant or sorcery spell."
Psychic Rebuttal71%
$0.22↓#20105↓0.1911.3 years↓
"Counter target instant or sorcery spell that targets you."
Frazzle70%
$0.10↓#30324↓0.00↓20.7 years↑
"Counter target nonblue spell."
Avoid Fate70%
$11.05↑#82540.38↑32.4 years↑
"Counter target instant or Aura spell that targets a permanent you control."
Miscast70%
$1.41↑#2838↑0.41↑6.3 years↓
"Counter target instant or sorcery spell unless its controller pays 
."
."