Whelming Wave 
Sorcery
$0.74 #2333 0.57 12.6 years
Return all creatures to their owners' hands except for Krakens, Leviathans, Octopuses, and Serpents.
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Cards similar to Whelming Wave 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.
Summon: Leviathan88%
$1.89↑#3791↓0.551.2 years↓
"Return each creature that isn't a Kraken, Leviathan, Merfolk, Octopus, or Serpent to its owner's hand."
Slinn Voda, the Rising Deep77%
$0.34↓#4694↓0.508.4 years↓
"When this card enters, if it was kicked, return all creatures to their owners' hands except for Merfolk, Krakens, Leviathans, Octopuses, and Serpents."