Shambleshark 
Creature — Shark Crab
$0.20 #20561 0.29 13.6 years
Flash (You may cast this spell any time you could cast an instant.)
Evolve (Whenever a creature you control enters, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.)
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Cards similar to Shambleshark 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.
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$0.26↑#1716↑0.2613.6 years
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$1.45↑#6255↑0.272.5 years↓
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Darwin, Adaptive Mutant95%
$0.27↑#26220↓0.00↓0.2 years↓
"Evolve"
Experiment One95%
$0.19↓#10483↑0.00↓13.7 years
"Evolve"
Simic Manipulator92%
$0.40↑#12510↑0.76↑13.6 years
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Tyranid Prime90%
$0.78↑#10010↑0.05↓3.9 years↓
"Evolve"
Lonis, Genetics Expert88%
$5.49↑#11041↑0.50↑2.5 years↓
"Evolve"
Mantle of Leadership88%
$0.28↑#231350.2719.6 years↑
"Flash"
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$6.64↑#1151↑0.47↑2.1 years↓
"Evolve"