Cards similar to Acid Rain 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.
Impending Disaster76%
$0.92↓#12947↑1.9227.7 years↓
"At the beginning of your upkeep, if there are seven or more lands on the battlefield, sacrifice this enchantment and destroy all lands."
Stench of Evil74%
$0.33↓#26689↓1.37↓31.4 years↓
"Destroy all Plains. For each land destroyed this way, this card deals 1 damage to that land's controller unless they pay
."
Myojin of Infinite Rage73%
$2.57↓#178531.21↓22.1 years↓
"Remove a divinity counter from this card: Destroy all lands."
Cleansing73%
$12.90↓#222131.17↓32.2 years
"For each land, destroy that land unless any player pays 1 life."
Catastrophe72%
$3.18↓#12635↑2.0028.0 years↓
"Destroy all lands or all creatures. Creatures destroyed this way can't be regenerated."
Bontu's Last Reckoning72%
$0.51↓#12805↑0.31↓9.3 years↓
"Destroy all creatures. Lands you control don't untap during your next untap step."
Jokulhaups71%
$5.62↓#11537↑2.59↑31.4 years↓
"Destroy all artifacts, creatures, and lands. They can't be regenerated."
Wake of Destruction70%
$0.78↓#168072.0127.4 years↓
"Destroy target land and all other lands with the same name as that land."