Vampire Hounds {2}{B}
Creature — Vampire Dog
Discard a creature card: This creature gets +2/+2 until end of 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.
Skyshroud Vampire 100%
#30553
"Discard a creature card: This creature gets +2/+2 until end of turn."
Erebos's Emissary 94%
$0.11#23379
"Discard a creature card: This creature gets +2/+2 until end of turn. If this permanent is an Aura, enchanted creature gets +2/+2 until end of turn instead."
Pulsating Illusion 82%
$0.14#30968
"Discard a card: This creature gets +4/+4 until end of turn. Activate only once each turn."