Elven Chorus 

Enchantment
You may look at the top card of your library any time.
You may cast creature spells from the top of your library.
Creatures you control have "{T}: Add one mana of any color."
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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.
Springleaf Parade 90%
$8.56#2396
"Creature tokens you control have "{T}: Add one mana of any color.""
Ranger Class 100%
$0.43#7487
"You may cast creature spells from the top of your library."
+1 more matching line
Eladamri, Korvecdal 100%
$3.76#2091
"You may cast creature spells from the top of your library."
+1 more matching line
Vivien, Monsters' Advocate 100%
$2.95#6254
"You may cast creature spells from the top of your library."
+1 more matching line
Garruk's Horde 100%
$0.18#9151
"You may cast creature spells from the top of your library."
+1 more matching line
Vizier of the Menagerie 100%
$0.37#4267
"You may cast creature spells from the top of your library."
+1 more matching line
Manaweft Sliver 84%
$2.85#3216
"Sliver creatures you control have "{T}: Add one mana of any color.""
Inga and Esika 82%
$2.44#2382
"Creatures you control have vigilance and "{T}: Add one mana of any color. Spend this mana only to cast a creature spell.""
+1 more matching line
Realmwalker 88%
$1.11#607
"You may cast creature spells of the chosen type from the top of your library."
+1 more matching line
Elsha of the Infinite 85%
$0.65#6506
"You may cast noncreature spells from the top of your library. If you cast a spell this way, you may cast it as though it had flash."
+1 more matching line