Zephyr Boots 
Artifact — Equipment
Equipped creature has flying.
Whenever equipped creature deals combat damage to a player, draw a card, then discard a card.
Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)
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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.
Suspicious Stowaway // Seafaring Werewolf 87%
$0.16#15739
"Whenever this creature deals combat damage to a player, draw a card, then discard a card."
Locke Cole 84%
$0.26#11183
"Whenever this card deals combat damage to a player, draw a card, then discard a card."
The Destined Thief 83%
$3.67#12280
"Whenever one or more creatures you control deal combat damage to one or more players, draw a card, then discard a card. If you have a full party, instead draw three cards."
Looter il-Kor 83%
$0.23#5479
"Whenever this creature deals damage to an opponent, draw a card, then discard a card."
Paleontologist's Pick-Axe // Dinosaur Headdress 82%
$0.54#17654
"Whenever equipped creature attacks, draw a card, then discard a card."
+2 more matching lines
Customs Depot 80%
$0.23#27108
"Whenever you cast a creature spell, you may pay {1}. If you do, draw a card, then discard a card."
Dragoon's Lance 86%
$0.23#7998
"During your turn, equipped creature has flying."
+1 more matching line
Mask of Griselbrand 83%
$0.70#3058
"Equipped creature has flying and lifelink."
+1 more matching line
Hulkbuster Armor 80%
$4.45#13773
"Equipped creature has base power and toughness 9/9 and has flying."
+1 more matching line