Charnel Troll 


Creature — Troll
Trample
At the beginning of your upkeep, exile a creature card from your graveyard. If you do, put a +1/+1 counter on this creature. Otherwise, sacrifice it.
{B}{G}, Discard a creature card: Put a +1/+1 counter on this creature.
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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.
Deathbonnet Sprout // Deathbonnet Hulk 93%
$0.13#14865
"At the beginning of your upkeep, you may exile a card from a graveyard. If a creature card was exiled this way, put a +1/+1 counter on this creature."
Tetravus 80%
#23275
"At the beginning of your upkeep, you may exile any number of tokens created with this creature. If you do, put that many +1/+1 counters on this creature."