Inquisitor's Flail 
Artifact — Equipment
If equipped creature would deal combat damage, it deals double that damage instead.
If another creature would deal combat damage to equipped creature, it deals double that damage to equipped creature instead.
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.
Mirrormind Crown 82%
$0.90#5123
"As long as this Equipment is attached to a creature, the first time you would create one or more tokens each turn, you may instead create that many tokens that are copies of equipped creature."
+1 more matching line
Bloodforged Battle-Axe 82%
$2.36#1697
"Whenever equipped creature deals combat damage to a player, create a token that's a copy of this Equipment."
+1 more matching line
Illusionist's Bracers 81%
$5.85#1592
"Whenever an ability of equipped creature is activated, if it isn't a mana ability, copy that ability. You may choose new targets for the copy."
+1 more matching line
Assimilation Aegis 81%
$0.41#9897
"Whenever this Equipment becomes attached to a creature, for as long as this Equipment remains attached to it, that creature becomes a copy of a creature card exiled with this Equipment."
+1 more matching line
Bark of Doran 80%
$0.21#15821
"As long as equipped creature's toughness is greater than its power, it assigns combat damage equal to its toughness rather than its power."