Pirate Hat 

Artifact — Equipment
$0.27 #14535 0.00 2.9 years
Equipped creature gets +1/+1 and has "Whenever this creature attacks, draw a card, then discard a card."
Equip Pirate 
Equip
(
: Attach to target creature you control. Equip only as a sorcery.)
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Cards similar to Pirate Hat 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.
Gemcutter Buccaneer74%
$0.31↑#5780↑0.002.9 years
"Treasures you control are Equipment in addition to their other types and have "Equipped creature gets +2/+0," equip Pirate
, and equip
."
Boosted Sloop74%
$0.25↓#10473↑0.001.7 years↓
"Whenever you attack, draw a card, then discard a card."
Pirate's Cutlass73%
$0.08↓#18560↓0.009.1 years↑
"When this Equipment enters, attach it to target Pirate you control."
+2 more matching lines
Fearless Swashbuckler73%
$0.22↓#10668↑0.061.7 years↓
"Whenever you attack, if a Pirate and a Vehicle attacked this combat, draw three cards, then discard two cards."
Paleontologist's Pick-Axe // Dinosaur Headdress72%
$0.55↑#18197↓0.002.9 years
"Whenever equipped creature attacks, draw a card, then discard a card."
+2 more matching lines
Adventurer's Airship71%
$0.21↓#10652↑0.071.4 years↓
"Whenever this Vehicle attacks, draw a card, then discard a card."
Bilbo's Ring71%
$8.24↑#4794↑0.34↑3.3 years
"Whenever equipped creature attacks alone, you draw a card and you lose 1 life."
Dire Fleet Captain71%
$0.22↓#162680.12↑9.1 years↑
"Whenever this creature attacks, it gets +1/+1 until end of turn for each other attacking Pirate."
Assassin Gauntlet70%
$0.31↑#5613↑0.24↑2.3 years
"Equipped creature gets +1/+1 and has "Whenever this creature deals combat damage to a player, draw a card, then discard a card.""
+1 more matching line
Swordsman, Sharp Scoundrel70%
$0.11↓#20117↓0.11↑0.3 years↓
"Whenever an equipped creature you control attacks, it connives."