The Masamune 
Legendary Artifact — Equipment
As long as equipped creature is attacking, it has first strike and must be blocked if able.
Equipped creature has "If a creature dying causes a triggered ability of this creature or an emblem you own to trigger, that ability triggers an additional time."
Equip {2}
click a line to search just that ability, click more to combine them
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.
Ace's Baseball Bat 91%
$0.44#11383
"As long as equipped creature is attacking, it has first strike and must be blocked by a Dalek if able."
+1 more matching line