Planar Collapse 

Enchantment
$0.43 #17843 0.47 27.6 years
At the beginning of your upkeep, if there are four or more creatures on the battlefield, sacrifice this enchantment and destroy all creatures. They can't be regenerated.
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Cards similar to Planar Collapse 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.
Plague Wind84%
$2.50↑#6513↑0.4626.3 years↓
"Destroy all creatures you don't control. They can't be regenerated."
Seal of Doom84%
$0.12↓#9437↑0.58↑26.6 years
"Sacrifice this enchantment: Destroy target nonblack creature. It can't be regenerated."
Consume the Meek84%
$0.19↓#196830.10↓16.4 years↓
"Destroy each creature with mana value 3 or less. They can't be regenerated."
Winds of Rath82%
$0.31↓#1645↑0.4528.9 years↑
"Destroy all creatures that aren't enchanted. They can't be regenerated."
Mageta the Lion82%
$2.65↑#212190.4426.3 years↓
"

,
, Discard two cards: Destroy all creatures except for Mageta. Those creatures can't be regenerated."
Wave of Terror81%
$0.89↑#29577↓0.4729.2 years↑
"At the beginning of your draw step, destroy each creature with mana value equal to the number of age counters on this enchantment. They can't be regenerated."
Damn80%
$2.03↑#345↑0.36↓5.3 years↓
"Destroy target creature. A creature destroyed this way can't be regenerated."
Breaking Point80%
$0.30↓#188070.60↑24.3 years↓
"Any player may have this card deal 6 damage to them. If no one does, destroy all creatures. Creatures destroyed this way can't be regenerated."
Retribution of the Meek79%
$8.86↑#12657↑0.67↑29.6 years↑
"Destroy all creatures with power 4 or greater. They can't be regenerated."
Serenity79%
$0.31↓#22137↓0.5729.2 years↑
"At the beginning of your upkeep, destroy all artifacts and enchantments. They can't be regenerated."
Deathbringer Regent78%
$0.30↓#7387↑1.05↑11.4 years↓
"When this creature enters, if you cast it from your hand and there are five or more other creatures on the battlefield, destroy all other creatures."
Dark Hatchling78%
$0.12↓#185020.3827.9 years
"When this creature enters, destroy target nonblack creature. It can't be regenerated."