Phase Dolphin {2}{U}
Creature — Elemental Whale
Whenever this creature attacks, another target attacking creature can't be blocked this turn.
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Cards that do something similar 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.
Clammy Prowler 100%
$0.23#11396
"Whenever this creature attacks, another target attacking creature can't be blocked this turn."
Mistford River Turtle 94%
$0.21#17414
"Whenever this creature attacks, another target attacking non-Human creature can't be blocked this turn."
Yuan Shao's Infantry 84%
$5.31#31156
"Whenever this creature attacks alone, this creature can't be blocked this combat."
Ogre Marauder 83%
$0.25#24804
"Whenever this creature attacks, it gains "this creature can't be blocked" until end of turn unless defending player sacrifices a creature of their choice."
Tilonalli's Skinshifter 83%
$0.26#22819
"Whenever this creature attacks, it becomes a copy of another target nonlegendary attacking creature until end of turn."