The Mycotyrant {1}{B}{G}
Legendary Creature — Elder Fungus
Trample
The Mycotyrant's power and toughness are each equal to the number of creatures you control that are Fungi and/or Saprolings.
At the beginning of your end step, create X 1/1 black Fungus creature tokens with "This token can't block," where X is the number of times you descended this turn. (You descend each time a permanent card is put into your graveyard from anywhere.)
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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.
Broodrage Mycoid 96%
$0.20#13832
"At the beginning of your end step, if you descended this turn, create a 1/1 black Fungus creature token with "This token can't block.""
The Raven Man 91%
$0.46#4696
"At the beginning of each end step, if a player discarded a card this turn, create a 1/1 black Bird creature token with flying and "This token can't block.""
Boneyard Mycodrax 82%
$0.31#14949
"this card's power and toughness are each equal to the number of other creature cards in your graveyard."
Splinterfright 82%
$0.27#5157
"this card's power and toughness are each equal to the number of creature cards in your graveyard."
+1 more matching line
Boneyard Wurm 82%
$0.28#13650
"this card's power and toughness are each equal to the number of creature cards in your graveyard."
Old Stickfingers 82%
$0.42#3857
"this card's power and toughness are each equal to the number of creature cards in your graveyard."
Revenant 82%
$0.17#18797
"this card's power and toughness are each equal to the number of creature cards in your graveyard."