Putrefaction 
Enchantment
$0.29 #27714 0.41 26.9 years
Whenever a player casts a green or white spell, that player discards a card.
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Cards similar to Putrefaction 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.
Gloomlance84%
$0.09↓#308860.07↓18.3 years↓
"Destroy target creature. If that creature was green or white, its controller discards a card."
Bereavement81%
$0.27↓#264680.80↑27.9 years
"Whenever a green creature dies, its controller discards a card."
Nurturer Initiate76%
$0.11↓#286520.00↓18.3 years↓
"Whenever a player casts a green spell, you may pay 
. If you do, target creature gets +1/+1 until end of turn."
. If you do, target creature gets +1/+1 until end of turn."
Glistening Deluge76%
$0.16↓#21082↑0.333.4 years↓
"All creatures get -1/-1 until end of turn. Creatures that are green and/or white get an additional -2/-2 until end of turn."
Deathmark74%
$0.11↓#19458↑0.20↓20.1 years↓
"Destroy target green or white creature."
Leshrac's Sigil74%
$0.32↑#18477↑0.4431.3 years↑
"Whenever an opponent casts a green spell, you may pay . If you do, look at that player's hand and choose a card from it. The player discards that card."
. If you do, look at that player's hand and choose a card from it. The player discards that card."
Wurm's Tooth74%
$0.13↓#14247↑0.3622.6 years↓
"Whenever a player casts a green spell, you may gain 1 life."
Talara's Bane74%
$0.07↓#302900.00↓18.1 years↓
"Target opponent reveals their hand. You choose a green or white creature card from it. You gain life equal to that creature card's toughness, then that player discards that card."
Wooden Sphere74%
$0.13↓#270150.27↓33.1 years↑
"Whenever a player casts a green spell, you may pay . If you do, you gain 1 life."
. If you do, you gain 1 life."
Lifebane Zombie74%
$0.55↑#242510.59↑13.1 years↓
"When this creature enters, target opponent reveals their hand. You choose a green or white creature card from it and exile that card."
Flash of Defiance73%
$0.23↓#292160.3624.6 years↓
"Green creatures and white creatures can't block this turn."
Coral Net72%
$0.22↓#293190.4724.6 years↓
"Enchant green or white creature"
Zombie Outlander72%
$0.20↓#286720.06↓17.6 years↓
"Protection from green"
Vodalian Zombie72%
$0.12↓#299700.05↓25.9 years
"Protection from green"
Woodlot Crawler72%
$0.05↓#287710.06↓13.3 years↓
"Protection from green"
Self-Inflicted Wound72%
$0.07↓#303570.20↓11.4 years↓
"Target opponent sacrifices a green or white creature of their choice. If that player does, they lose 2 life."
Angel's Feather71%
$0.19↓#10131↑0.00↓22.6 years↓
"Whenever a player casts a white spell, you may gain 1 life."
Ivory Cup71%
$0.17↓#249200.00↓33.1 years↑
"Whenever a player casts a white spell, you may pay . If you do, you gain 1 life."
. If you do, you gain 1 life."
Apothecary Initiate71%
$0.16↓#239910.20↓18.3 years↓
"Whenever a player casts a white spell, you may pay . If you do, you gain 1 life."
. If you do, you gain 1 life."
Irini Sengir71%
$0.23↓#279980.4730.9 years↑
"Green enchantment spells and white enchantment spells cost 
more to cast."
more to cast."