Jubilation {5}{G}
Creature — Elemental Incarnation
When this creature enters, creatures you control get +2/+2 and gain trample until end of turn.
Encore {7}{G}{G} ({7}{G}{G}, 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.
Centaur Chieftain 86%
$0.13#27925
"As long as there are seven or more cards in your graveyard, this creature has "When this creature enters, creatures you control get +1/+1 and gain trample until end of turn.""
Earthshaker Giant 86%
#13891
"When this creature enters, other creatures you control get +3/+3 and gain trample until end of turn."
Rumbleweed 86%
$3.54#5934
"When this creature enters, other creatures you control get +3/+3 and gain trample until end of turn."