Clockwork Droid 
Artifact Creature — Robot
$0.24 #16125 0.35 2.9 years
You may exert this creature as it attacks. When you do, it can't be blocked this turn and you scry 1. (An exerted creature won't untap during your next untap step. To scry 1, look at the top card of your library. You may put that card on the bottom.)
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Cards similar to Clockwork Droid 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.
Khenra Scrapper76%
$0.07↓#28038↓1.07↑9.2 years↑
"You may exert this creature as it attacks. When you do, it gets +2/+0 until end of turn."
Nef-Crop Entangler75%
$0.03↓#28190↓0.09↓9.4 years↑
"You may exert this creature as it attacks. When you do, it gets +1/+2 until end of turn."
Hooded Brawler75%
$0.08↓#28730↓0.449.4 years↑
"You may exert this creature as it attacks. When you do, it gets +2/+2 until end of turn."