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 99%
$0.04#27821
"{1}{B}: This creature gets +2/+2 until end of turn."
Zof Shade 97%
$0.04#30705
"{2}{B}: This creature gets +2/+2 until end of turn."
Inkrise Infiltrator 95%
$0.27#13061
"{3}{B}: This creature gets +2/+2 until end of turn."
Barrow Naughty 91%
$0.15#16727
"{2}{B}: This creature gets +1/+0 until end of turn."
Thirsting Shade 91%
$0.14#24906
"{2}{B}: This creature gets +1/+1 until end of turn."
Masked Blackguard 91%
$0.07#27359
"{2}{B}: This creature gets +1/+1 until end of turn."
Dross Ripper 91%
$0.06#30945
"{2}{B}: This creature gets +1/+1 until end of turn."
Yarok's Fenlurker 91%
$0.39#11229
"{2}{B}: This creature gets +1/+1 until end of turn."
Stallion of Ashmouth 91%
$0.04#28886
"{1}{B}: This creature gets +1/+1 until end of turn. Activate only if there are four or more card types among cards in your graveyard."
Dauthi Mercenary 90%
#21235
"{1}{B}: This creature gets +1/+0 until end of turn."
Nightwing Shade 90%
$0.03#29944
"{1}{B}: This creature gets +1/+1 until end of turn."
Burrog Banemaker 90%
$0.18#18291
"{1}{B}: This creature gets +1/+1 until end of turn."
Tattered Apparition 90%
$0.06#29493
"{1}{B}: This creature gets +1/+1 until end of turn."
Veiled Shade 90%
$0.06#30257
"{1}{B}: This creature gets +1/+1 until end of turn."
Caldera Kavu 90%
$0.07#30440
"{1}{B}: This creature gets +1/+1 until end of turn."
Augmenting Automaton 90%
$0.05#27122
"{1}{B}: This creature gets +1/+1 until end of turn."
Ghostly Changeling 90%
$0.20#17115
"{1}{B}: This creature gets +1/+1 until end of turn."
Ravine Raider 90%
$0.15#12491
"{1}{B}: This creature gets +1/+1 until end of turn."
Battlefield Percher 90%
$0.15#31504
"{1}{B}: This creature gets +1/+1 until end of turn."
Knight of Dusk's Shadow 90%
$0.26#9849
"{1}{B}: This creature gets +1/+1 until end of turn."