Chainsaw 
Artifact — Equipment
$1.22 #3795 0.26 2.1 years
When this Equipment enters, it deals 3 damage to up to one target creature.
Whenever one or more creatures die, put a rev counter on this Equipment.
Equipped creature gets +X/+0, where X is the number of rev counters on this Equipment.
Equip 
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Cards similar to Chainsaw 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.
Malefic Scythe90%
$0.14↓#19027↓0.00↓6.3 years↑
"Equipped creature gets +1/+1 for each soul counter on this Equipment."
+1 more matching line
Corrupt Eunuchs86%
$8.52↑#31575↓0.00↓27.5 years↑
"When this creature enters, it deals 2 damage to target creature."
Goblin Commando86%
$0.17↓#27177↓0.07↓27.3 years↑
"When this creature enters, it deals 2 damage to target creature."
Fire Imp86%
$0.05↓#30892↓0.05↓29.5 years↑
"When this creature enters, it deals 2 damage to target creature."
Flametongue Kavu85%
$0.08↓#13229↓0.00↓25.7 years↑
"When this creature enters, it deals 4 damage to target creature."
Gardenize82%
$1.07↓#14343↓0.40↑0.0 years↓
"Whenever a creature you control dies, put a charge counter on this enchantment."
Hankyu82%
$0.18↓#21712↓0.3322.1 years↑
"Equip 
"
"
Explosive Shot80%
$0.10↓#19055↓0.06↓0.9 years↓
"this card deals 4 damage to target creature."
Banshee's Blade80%
$0.30↓#16256↓0.12↓23.0 years↑
"Equipped creature gets +1/+1 for each charge counter on this Equipment."
Breath of Fire78%
$0.10↓#26900↓0.00↓8.3 years↑
"this card deals 2 damage to target creature."
Ragefire78%
$0.14↓#29696↓0.00↓7.7 years↑
"this card deals 3 damage to target creature."
Engulfing Eruption78%
$0.19↓#30233↓0.00↓7.3 years↑
"this card deals 5 damage to target creature."
Concentrated Fire78%
$0.14↓#26201↓0.10↓0.3 years↓
"this card deals 5 damage to target creature."
Command the Storm78%
$0.06↓#24885↓0.00↓8.0 years↑
"this card deals 5 damage to target creature."
Scorching Shot78%
$0.27↓#10805↓0.00↓2.5 years
"this card deals 5 damage to target creature."
Bathe in Dragonfire78%
$0.04↓#19650↓0.15↓11.7 years↑
"this card deals 4 damage to target creature."
Electrify78%
$0.04↓#24874↓0.249.5 years↑
"this card deals 4 damage to target creature."
Flame Slash78%
$0.17↓#7764↓0.00↓16.5 years↑
"this card deals 4 damage to target creature."
Bombard78%
$0.04↓#15176↓0.05↓8.8 years↑
"this card deals 4 damage to target creature."
Fiery Finish78%
$0.05↓#28019↓0.00↓8.3 years↑
"this card deals 7 damage to target creature."