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.
Perilous Shadow 98%
$0.04#27821
"{1}{B}: This creature gets +2/+2 until end of turn."
Inkrise Infiltrator 97%
$0.27#13061
"{3}{B}: This creature gets +2/+2 until end of turn."
Festerleech 97%
$0.17#19846
"{1}{B}: This creature gets +2/+2 until end of turn. Activate only once each turn."
Barrow Naughty 95%
$0.15#16727
"{2}{B}: This creature gets +1/+0 until end of turn."
Thirsting Shade 95%
$0.14#24906
"{2}{B}: This creature gets +1/+1 until end of turn."
Masked Blackguard 95%
$0.07#27359
"{2}{B}: This creature gets +1/+1 until end of turn."
Dross Ripper 95%
$0.06#30945
"{2}{B}: This creature gets +1/+1 until end of turn."
Yarok's Fenlurker 95%
$0.39#11229
"{2}{B}: This creature gets +1/+1 until end of turn."
Dauthi Mercenary 92%
#21235
"{1}{B}: This creature gets +1/+0 until end of turn."
Nightwing Shade 92%
$0.03#29944
"{1}{B}: This creature gets +1/+1 until end of turn."
Burrog Banemaker 92%
$0.18#18291
"{1}{B}: This creature gets +1/+1 until end of turn."
Tattered Apparition 92%
$0.06#29493
"{1}{B}: This creature gets +1/+1 until end of turn."
Veiled Shade 92%
$0.06#30257
"{1}{B}: This creature gets +1/+1 until end of turn."
Caldera Kavu 92%
$0.07#30440
"{1}{B}: This creature gets +1/+1 until end of turn."
Augmenting Automaton 92%
$0.05#27122
"{1}{B}: This creature gets +1/+1 until end of turn."
Ghostly Changeling 92%
$0.20#17115
"{1}{B}: This creature gets +1/+1 until end of turn."
Ravine Raider 92%
$0.15#12491
"{1}{B}: This creature gets +1/+1 until end of turn."
Battlefield Percher 92%
$0.15#31504
"{1}{B}: This creature gets +1/+1 until end of turn."
Knight of Dusk's Shadow 92%
$0.26#9849
"{1}{B}: This creature gets +1/+1 until end of turn."
Graverobber Spider 91%
$0.14#17410
"{3}{B}: This creature gets +X/+X until end of turn, where X is the number of creature cards in your graveyard. Activate only once each turn."