Ashling's Prerogative 
Enchantment
$0.65 #17849 0.47 18.9 years
As this enchantment enters, choose odd or even. (Zero is even.)
Each creature with mana value of the chosen quality has haste.
Each creature without mana value of the chosen quality enters tapped.
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Cards similar to Ashling's Prerogative 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.
Urabrask the Hidden86%
$4.08↑#1767↑0.70↑15.3 years↓
"Creatures you control have haste."
+1 more matching line
Lavabrink Venturer84%
$0.16↓#25037↓0.13↓6.4 years↓
"As this creature enters, choose odd or even."
+1 more matching line
Gollum, Riddle Master80%
$2.72↑#182180.00↓0.1 years↓
"As this card enters, choose odd or even."
+1 more matching line
Uphill Battle78%
$5.50↑#149140.67↑26.9 years↑
"Creatures played by your opponents enter tapped."
False Floor75%
$0.25↓#190110.06↓4.4 years↓
"Creatures enter tapped."
Imposing Sovereign74%
$0.39↓#12263↑0.79↑13.1 years↓
"Creatures your opponents control enter tapped."
Kinjalli's Sunwing72%
$0.87↑#3279↑0.70↑8.9 years↓
"Creatures your opponents control enter tapped."
Mutinous Massacre70%
$0.25↓#6876↑0.531.1 years↓
"Choose odd or even. Destroy each creature with mana value of the chosen quality. Then gain control of all creatures until end of turn. Untap them. They gain haste until end of turn."
Authority of the Consuls70%
$4.54↑#335↑1.15↑9.9 years↓
"Creatures your opponents control enter tapped."