Grifter's Blade 
Artifact — Equipment
Flash
As this Equipment enters, choose a creature you control it could be attached to. If you do, it enters attached to that creature.
Equipped creature gets +1/+1.
Equip {1}
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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.
Sai of the Shinobi 87%
$0.33#15317
"Whenever a creature you control enters, you may attach this Equipment to it."
+2 more matching lines
Stormrider Rig 87%
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"Whenever a creature you control enters, you may attach this Equipment to it."
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Hero's Blade 87%
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"Whenever a legendary creature you control enters, you may attach this Equipment to it."
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Ronin Warclub 84%
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"Whenever a creature you control enters, attach this Equipment to that creature."
+2 more matching lines
Sigarda's Aid 83%
$17.92#856
"Whenever an Equipment you control enters, you may attach it to target creature you control."
Dredging Claw 83%
$0.18#22790
"Whenever a creature enters from your graveyard, you may attach this Equipment to it."
Harvest Hand // Scrounged Scythe 100%
$0.22#17642
"Equipped creature gets +1/+1."
+1 more matching line