Riptide 
Instant
$0.30 #29225 0.73 32.2 years
Tap all blue creatures.
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Cards similar to Riptide 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.
Magistrate's Veto78%
$0.25↓#254960.42↓27.0 years↓
"White creatures and blue creatures can't block."
Magnetic Mountain77%
$0.41↑#234071.08↑32.8 years
"Blue creatures don't untap during their controllers' untap steps."
Thelon's Curse77%
$0.63↑#319150.84↑32.0 years
"Blue creatures don't untap during their controllers' untap steps."
Mudbrawler Raiders76%
$0.21↓#314750.11↓18.5 years↓
"This creature can't be blocked by blue creatures."
Blue Scarab76%
$0.24↓#252420.25↓31.4 years
"Enchanted creature can't be blocked by blue creatures."
Evaporate73%
$0.21↓#313550.06↓31.1 years↓
"this card deals 1 damage to each white and/or blue creature."
Circle of Protection: Blue73%
$0.09↓#22047↑0.27↓33.2 years
"
: The next time a blue source of your choice would deal damage to you this turn, prevent that damage."
: The next time a blue source of your choice would deal damage to you this turn, prevent that damage."
Sphere of Reason72%
$0.24↓#301580.16↓25.1 years↓
"If a blue source would deal damage to you, prevent 2 of that damage."
Fylamarid70%
$0.21↓#284780.10↓29.0 years↓
"This creature can't be blocked by blue creatures."
Metathran Transport70%
$0.14↓#304180.06↓26.0 years↓
"This creature can't be blocked by blue creatures."
Nacatl Outlander70%
$0.13↓#282180.00↓17.7 years↓
"Protection from blue"
Yavimaya Barbarian70%
$0.11↓#299250.00↓26.0 years↓
"Protection from blue"
Karoo Meerkat70%
$0.16↓#305280.25↓30.0 years↓
"Protection from blue"
Guma70%
$0.28↓#301480.00↓28.0 years↓
"Protection from blue"