Rust 
Instant
$0.59 #27962 0.06 32.3 years
Counter target activated ability from an artifact source. (Mana abilities can't be targeted.)
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Interdict89%
$0.34↓#225290.32↑28.9 years↓
"Counter target activated ability from an artifact, creature, enchantment, or land. That permanent's activated abilities can't be activated this turn."
Brown Ouphe86%
$0.15↓#249030.53↑31.3 years↓
"
, 
: Counter target activated ability from an artifact source."
, : Counter target activated ability from an artifact source."
Stifle86%
$9.53↑#4588↑0.77↑23.3 years↓
"Counter target activated or triggered ability."
Bind84%
$5.13↑#15301↑0.0025.9 years↓
"Counter target activated ability."
Disallow82%
$0.41↓#1819↑0.45↑9.6 years↓
"Counter target spell, activated ability, or triggered ability."
Squelch80%
$0.26↓#22228↑0.41↑21.9 years↓
"Counter target activated ability."
Repudiate // Replicate80%
$0.34↓#9248↑0.50↑7.6 years↓
"Counter target activated or triggered ability."
Ayesha Tanaka80%
$0.35↓#259120.50↑32.3 years
": Counter target activated ability from an artifact source unless that ability's controller pays 
."
: Counter target activated ability from an artifact source unless that ability's controller pays ."
Ouphe Vandals78%
$0.19↓#288090.86↑22.3 years↓
", Sacrifice this creature: Counter target activated ability from an artifact source and destroy that artifact if it's on the battlefield."
, Sacrifice this creature: Counter target activated ability from an artifact source and destroy that artifact if it's on the battlefield."
Artifact Blast77%
$2.31↑#17978↑0.27↑32.5 years
"Counter target artifact spell."
Voidslime77%
$0.32↓#4511↑0.25↑20.3 years↓
"Counter target spell, activated ability, or triggered ability."
Spell Blast76%
$0.09↓#20029↑0.24↑33.1 years
"Counter target spell with mana value X."
Trickbind74%
$9.21↑#6494↑0.1419.9 years↓
"Counter target activated or triggered ability. If a permanent's ability is countered this way, activated abilities of that permanent can't be activated this turn."
Intervene74%
$0.37↓#15789↑0.50↑27.6 years↓
"Counter target spell that targets a creature."
Green Slime74%
$1.55↑#5604↑0.27↑4.2 years↓
"When this creature enters, counter target activated or triggered ability from an artifact or enchantment source. If a permanent's ability is countered this way, destroy that permanent."
Emerald Dragon // Dissonant Wave73%
$0.23↓#9870↑0.004.2 years↓
"Counter target activated or triggered ability from a noncreature source."
Dismiss73%
$0.14↓#11646↑0.50↑28.9 years↓
"Counter target spell."
Brokers Confluence72%
$1.42↑#10009↑0.55↑4.4 years↓
"• Counter target activated or triggered ability."
Annul72%
$0.14↓#4604↑0.57↑27.9 years↓
"Counter target artifact or enchantment spell."
Counterspell72%
$2.27↑#16↑0.70↑33.1 years
"Counter target spell."