Undercity Troll {1}{G}
Creature — Troll
Renown 1 (When this creature deals combat damage to a player, if it isn't renowned, put a +1/+1 counter on it and it becomes renowned.)
{2}{G}: Regenerate this creature. (The next time this creature would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)
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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.
Krosan Avenger 97%
$0.05#30992
"{1}{G}: Regenerate this creature. Activate only if there are seven or more cards in your graveyard."
Dragon-Scarred Bear 96%
$0.27#13519
"{1}{G}: Regenerate this creature. Activate only if creatures you control have total power 8 or greater."