Last Laugh {2}{B}{B}
Enchantment
Whenever a permanent other than this enchantment is put into a graveyard from the battlefield, this enchantment deals 1 damage to each creature and each player.
When no creatures are on the battlefield, sacrifice this enchantment.
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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.
Task Mage Assembly 100%
$0.23#27429
"When there are no creatures on the battlefield, sacrifice this enchantment."
Porphyry Nodes 100%
$0.26#21280
"When there are no creatures on the battlefield, sacrifice this enchantment."
Drop of Honey 100%
#23996
"When there are no creatures on the battlefield, sacrifice this enchantment."
Call to the Grave 84%
$2.55#12778
"At the beginning of the end step, if no creatures are on the battlefield, sacrifice this enchantment."
Pestilence 84%
$0.79#4249
"At the beginning of the end step, if no creatures are on the battlefield, sacrifice this enchantment."
+1 more matching line
Pyrohemia 84%
$13.51#2652
"At the beginning of the end step, if no creatures are on the battlefield, sacrifice this enchantment."