Curse of Silence 
Enchantment — Aura Curse
$0.35 #11912 0.56 5.1 years
Enchant player
As this Aura enters, choose a card name.
Spells with the chosen name enchanted player casts cost 
more to cast.
more to cast.Whenever enchanted player casts a spell with the chosen name, you may sacrifice this Aura. If you do, draw a card.
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Cards similar to Curse of Silence 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.
Disruptor Flute85%
$1.96↑#7309↑1.13↑2.3 years↓
"As this artifact enters, choose a card name."
+1 more matching line
Anointed Peacekeeper82%
$0.30↓#18904↓0.79↑4.1 years
"Spells your opponents cast with the chosen name cost more to cast."
more to cast."+1 more matching line
Silverquill Silencer82%
$0.19↓#24660↓0.44↓5.5 years
"As this creature enters, choose a nonland card name."
+1 more matching line
Declaration of Naught80%
$15.06↑#18330↓1.00↑18.7 years↑
"As this enchantment enters, choose a card name."
Skyseer's Chariot78%
$0.18↓#17685↓0.32↓1.7 years↓
"As this Vehicle enters, choose a nonland card name."
+1 more matching line
Runed Halo76%
$0.15↓#19130↓0.69↑18.5 years↑
"As this enchantment enters, choose a card name."
God-Pharaoh's Statue75%
$0.66↑#2451↑1.60↑7.5 years↑
"Spells your opponents cast cost more to cast."
more to cast."
Pithing Needle74%
$0.40↑#6545↑0.89↑21.4 years↑
"As this artifact enters, choose a card name."
+1 more matching line
Sphere of Resistance73%
$9.90↑#8502↑1.55↑28.3 years↑
"Spells cost 
more to cast."
more to cast."
Grand Arbiter Augustin IV70%
$18.23↑#1808↑2.76↑20.5 years↑
"Spells your opponents cast cost more to cast."
more to cast."