Consuming Fervor 
Enchantment — Aura
$0.15 #21980 0.00 9.4 years
Enchant creature
Enchanted creature gets +3/+3 and has "At the beginning of your upkeep, put a -1/-1 counter on this creature."
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Cards similar to Consuming Fervor 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.
Unstable Mutation92%
$0.09↓#254320.40↑32.7 years↑
"At the beginning of the upkeep of enchanted creature's controller, put a -1/-1 counter on that creature."
Biting Tether82%
$0.23↑#263480.36↑18.3 years↑
"At the beginning of your upkeep, put a -1/-1 counter on enchanted creature."
+1 more matching line