Qasali Ambusher {1}{G}{W}
Creature — Cat Warrior
Reach
If a creature is attacking you and you control a Forest and a Plains, you may cast this creature without paying its mana cost and as though it had flash.
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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.
Scarring Memories 84%
$0.22#16565
"You may cast this spell as though it had flash if you control an attacking legendary creature."
Geode Golem 83%
$0.33#3061
"Whenever this creature deals combat damage to a player, you may cast your commander from the command zone without paying its mana cost."
Backdraft Hellkite 81%
$0.50#7923
"Whenever this creature attacks, each instant and sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost."
Molten Exhale 81%
$0.15#13599
"You may cast this spell as though it had flash if you behold a Dragon as an additional cost to cast it."
Once Upon a Time 80%
$1.45#8818
"If this spell is the first spell you've cast this game, you may cast it without paying its mana cost."
Smirking Spelljacker 80%
$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."