Mordant Dragon {3}{R}{R}{R}
Creature — Dragon
Flying
{1}{R}: This creature gets +1/+0 until end of turn.
Whenever this creature deals combat damage to a player, you may have it deal that much damage to target creature that player controls.
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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.
Spark Mage 91%
$2.50#10316
"Whenever this creature deals combat damage to a player, you may have this creature deal 1 damage to target creature that player controls."
Snapping Thragg 85%
$0.09#30499
"Whenever this creature deals combat damage to a player, you may have it deal 3 damage to target creature that player controls."
Skirk Commando 85%
$0.07#24377
"Whenever this creature deals combat damage to a player, you may have it deal 2 damage to target creature that player controls."
Riptide Entrancer 84%
$1.41#17917
"Whenever this creature deals combat damage to a player, you may sacrifice it. If you do, gain control of target creature that player controls."
Cunning Giant 81%
$2.10#31105
"If this creature is unblocked, you may have it assign its combat damage to a creature defending player controls."
Coveted Peacock 80%
$0.22#18516
"Whenever this creature attacks, you may goad target creature defending player controls."
Goblin Racketeer 80%
$0.24#19948
"Whenever this creature attacks, you may goad target creature defending player controls."
Stormshriek Feral // Flush Out 100%
$0.19#6615
"{1}{R}: This creature gets +1/+0 until end of turn."