Surge Engine 
Artifact Creature — Construct
$0.46 #16149 0.35 4.4 years
Defender
: This creature loses defender and gains "This creature can't be blocked.": This creature becomes blue and has base power and toughness 5/4. Activate only if this creature doesn't have defender.
: Draw three cards. Activate only if this creature is blue and only once.Click a line or tag to filter
Cards similar to Surge Engine 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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"
: This creature can't be blocked this turn."
: This creature can't be blocked this turn."+1 more matching line
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"Defender"
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"Defender"