Porphyry Nodes {W}
Enchantment
At the beginning of your upkeep, destroy the creature with the least power. It can't be regenerated. If two or more creatures are tied for least power, you choose one of them.
When there are no creatures 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.
Drop of Honey 100%
#23996
"When there are no creatures on the battlefield, sacrifice this enchantment."
+1 more matching line
Task Mage Assembly 100%
$0.23#27429
"When there are no creatures on the battlefield, sacrifice this enchantment."
Call to the Grave 83%
$2.55#12778
"At the beginning of the end step, if no creatures are on the battlefield, sacrifice this enchantment."
Pestilence 83%
$0.79#4249
"At the beginning of the end step, if no creatures are on the battlefield, sacrifice this enchantment."
Pyrohemia 83%
$13.51#2652
"At the beginning of the end step, if no creatures are on the battlefield, sacrifice this enchantment."