Mirkwood Trapper 


Creature — Elf Scout
Whenever a player attacks you, target attacking creature gets -2/-0 until end of turn.
Whenever a player attacks, if they aren't attacking you, that player chooses an attacking creature. It gets +2/+0 until end of turn.
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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.
Septic Rats 83%
$0.39#10538
"Whenever this creature attacks, if defending player is poisoned, it gets +1/+1 until end of turn."
Sickle Dancer 82%
$0.04#30874
"Whenever this creature attacks, if your team controls another Warrior, this creature gets +1/+1 until end of turn."
Vedalken Mesmerist 82%
$0.02#29049
"Whenever this creature attacks, target creature an opponent controls gets -2/-0 until end of turn."
Binding Geist // Spectral Binding 82%
$0.06#25506
"Whenever this creature attacks, target creature an opponent controls gets -2/-0 until end of turn."
Seraph of New Capenna // Seraph of New Phyrexia 81%
$0.15#25475
"Whenever this creature attacks, you may sacrifice another creature or artifact. If you do, this creature gets +2/+1 until end of turn."
Comet Crawler 81%
$0.19#18242
"Whenever this creature attacks, you may sacrifice another creature or artifact. If you do, this creature gets +2/+0 until end of turn."
Seasoned Warrenguard 80%
$0.18#13817
"Whenever this creature attacks while you control a token, this creature gets +2/+0 until end of turn."
Attack-in-the-Box 80%
$0.17#18165
"Whenever this creature attacks, you may have it get +4/+0 until end of turn. If you do, sacrifice it at the beginning of the next end step."
Heir of the Wilds 80%
$0.24#16000
"Whenever this creature attacks, if you control a creature with power 4 or greater, this creature gets +1/+1 until end of turn."