Okk 

Creature — Goblin
$0.31 #25018 0.22 27.9 years
This creature can't attack unless a creature with greater power also attacks.
This creature can't block unless a creature with greater power also blocks.
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Cards similar to Okk expected a card that isn't here?
Reports become test cases the matcher is graded against before an update ships. Delvefall isn't a chatbot guessing, it compares the printed rules text of every card with plain math, and examples like yours decide which differences should count.
Orgg95%
$0.32↑#31611↓0.43↑31.8 years↑
"This creature can't block creatures with power 3 or greater."
+1 more matching line
Goblin Mutant95%
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"This creature can't block creatures with power 3 or greater."
+1 more matching line
Brassclaw Orcs92%
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"This creature can't block creatures with power 2 or greater."
Ironclaw Orcs92%
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"This creature can't block creatures with power 2 or greater."
Tiger-Dillo90%
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"This creature can't attack or block unless you control another creature with power 4 or greater."
Cyclops Tyrant88%
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"This creature can't block creatures with power 2 or less."
Hipparion88%
$0.17↓#269460.00↓31.3 years↑
"This creature can't block creatures with power 3 or greater unless you pay
."
Mogg Jailer88%
$0.11↓#31590↓0.2625.6 years↓
"This creature can't attack if defending player controls an untapped creature with power 2 or less."
Orcish Conscripts87%
$0.07↓#30546↓0.60↑31.3 years↑
"This creature can't attack unless at least two other creatures attack."
+1 more matching line
Rhonas the Indomitable86%
$5.08↑#5177↑0.149.4 years↓
"Rhonas can't attack or block unless you control another creature with power 4 or greater."