The Death of Gwen Stacy 

Enchantment — Saga
(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I — Destroy target creature.
II — Each player may discard a card. Each player who doesn't loses 3 life.
III — Exile any number of target players' graveyards.
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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.
Strongarm Tactics 94%
$0.36#23992
"Each player discards a card. Then each player who didn't discard a creature card this way loses 4 life."
Yurlok of Scorch Thrash 83%
$0.43#8272
"A player losing unspent mana causes that player to lose that much life."
Creeping Dread 82%
$0.19#14175
"At the beginning of your upkeep, each player discards a card. Each opponent who discarded a card that shares a card type with the card you discarded loses 3 life."