Foster {2}{G}{G}
Enchantment
Whenever a creature you control dies, you may pay {1}. If you do, reveal cards from the top of your library until you reveal a creature card. Put that card into your hand and the rest into your graveyard.
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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.
Squirrel Sanctuary 87%
$0.37#9015
"Whenever a nontoken creature you control dies, you may pay {1}. If you do, return this enchantment to its owner's hand."
Meathook Massacre II 87%
$2.55#3054
"Whenever a creature you control dies, you may pay 3 life. If you do, return that card under your control with a finality counter on it."
Remembrance 87%
$9.46#12714
"Whenever a nontoken creature you control dies, you may search your library for a card with the same name as that creature, reveal it, put it into your hand, then shuffle."
Kinzu of the Bleak Coven 85%
$0.33#12830
"Whenever another nontoken creature you control dies, you may pay 2 life and exile it. If you do, create a token that's a copy of that creature, except it's 1/1 and has toxic 1."
Erebos, Bleak-Hearted 83%
$1.73#4022
"Whenever another creature you control dies, you may pay 2 life. If you do, draw a card."
Spinner of Souls 83%
$0.38#4009
"Whenever another nontoken creature you control dies, you may reveal cards from the top of your library until you reveal a creature card. Put that card into your hand and the rest on the bottom of your library in a random order."
Hawkeye, Avenging Archer 83%
$0.37#21716
"Whenever a creature an opponent controls dies, if this card dealt damage to it this turn, draw a card."
Massacre Girl, Known Killer 82%
$0.65#1652
"Whenever a creature an opponent controls dies, if its toughness was less than 1, draw a card."
The Cauldron of Eternity 82%
$1.37#9119
"Whenever a creature you control dies, put it on the bottom of its owner's library."
The Balrog, Flame of Udûn 82%
$0.39#20789
"When a legendary creature an opponent controls dies, put this card on the bottom of its owner's library."
Garna, Bloodfist of Keld 82%
$0.13#3643
"Whenever another creature you control dies, draw a card if it was attacking. Otherwise, this card deals 1 damage to each opponent."
Cemetery Puca 81%
$2.70#19361
"Whenever a creature dies, you may pay {1}. If you do, this creature becomes a copy of that creature, except it has this ability."
Village Pillagers 81%
$0.32#6070
"Whenever a creature an opponent controls with a counter on it dies, you create a tapped Treasure token."
Bane, Lord of Darkness 80%
$0.30#13645
"Whenever another nontoken creature you control dies, target opponent may have you draw a card. If they don't, you may put a creature card with equal or lesser toughness from your hand onto the battlefield."