Eumidian Wastewaker {2}{B}{B}
Creature — Insect Cleric
Whenever this creature attacks, you and defending player each discard a card or sacrifice a permanent. You draw a card for each land card put into a graveyard this way.
Encore {6}{B}{B} ({6}{B}{B}, Exile this card from your graveyard: For each opponent, create a token copy that attacks that opponent this turn if able. They gain haste. Sacrifice them at the beginning of the next end step. Activate only as a sorcery.)
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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.
Burning-Tree Vandal 90%
$0.19#21076
"Whenever this creature attacks, you may discard a card. If you do, draw a card."
Null Group Biological Assets 90%
$0.08#25398
"Whenever this creature attacks, you may discard a card. If you do, draw a card."
Vaultbreaker 90%
$0.05#24386
"Whenever this creature attacks, you may discard a card. If you do, draw a card."
Abyssal Nightstalker 89%
$0.50#27330
"Whenever this creature attacks and isn't blocked, defending player discards a card."
Shrieking Specter 88%
$1.08#30458
"Whenever this creature attacks, defending player discards a card."
Veronica, Dissident Scribe 84%
$0.34#8598
"Whenever this card attacks, you may discard a card. If you do, draw a card."
Smirking Spelljacker 84%
$2.79#6873
"Whenever this creature attacks, if a card is exiled with it, you may cast the exiled card without paying its mana cost."
Azula, Ruthless Firebender 83%
$0.77#13694
"Whenever this card attacks, you may discard a card. Then you get an experience counter for each player who discarded a card this turn."
+1 more matching line
Wandering Champion 82%
$0.02#28803
"Whenever this creature deals combat damage to a player, if you control a blue or red permanent, you may discard a card. If you do, draw a card."
The Haunt of Hightower 82%
$2.82#7136
"Whenever this card attacks, defending player discards a card."
Academy Raider 82%
$0.10#20401
"Whenever this creature deals combat damage to a player, you may discard a card. If you do, draw a card."
Pygmy Hippo 82%
$2.07#25396
"Whenever this creature attacks and isn't blocked, you may have defending player activate a mana ability of each land they control and lose all unspent mana. If you do, this creature assigns no combat damage this turn and at the beginning of your next main phase this turn, you add an amount of {C} equal to the amount of mana that player lost this way."
Rakdos Ringleader 82%
$0.12#25509
"Whenever this creature deals combat damage to a player, that player discards a card at random."
Stromgald Spy 81%
$0.15#29721
"Whenever this creature attacks and isn't blocked, you may have defending player play with their hand revealed for as long as this creature remains on the battlefield. If you do, this creature assigns no combat damage this turn."
Xantid Swarm 81%
$3.88#13727
"Whenever this creature attacks, defending player can't cast spells this turn."
Stronghold Rats 81%
$0.72#7516
"Whenever this creature deals combat damage to a player, each player discards a card."