Emrakul's Messenger 
Creature — Eldrazi Faerie Rogue
$0.35 #2518 0.21 2.3 years
Devoid (This card has no color.)
Flying
Whenever you draw your second card each turn, create a 0/1 colorless Eldrazi Spawn creature token with "Sacrifice this token: Add 
."
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Cards similar to Emrakul's Messenger 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.
Messenger Hawk94%
$0.08↓#24297↓0.10↓0.9 years↓
"Flying"
Prince Imrahil the Fair91%
$0.20↓#3405↓0.143.3 years
"Whenever you draw your second card each turn, create a 1/1 white Human Soldier creature token."
Vestige of Emrakul90%
$0.11↓#28961↓0.2411.0 years↑
"Devoid"
Mad Ratter88%
$0.19↓#11596↓0.117.0 years↑
"Whenever you draw your second card each turn, create two 1/1 black Rat creature tokens."
Call the Scions87%
$0.13↓#13068↓0.09↓11.0 years↑
"Devoid"
Mischievous Mystic86%
$0.34↓#26420.151.9 years
"Whenever you draw your second card each turn, create a 1/1 blue Faerie creature token with flying."
Blisterpod86%
$0.11↓#11131↓0.00↓11.0 years↑
"Devoid"
Silent Skimmer85%
$0.05↓#25781↓0.2011.0 years↑
"Devoid"
Stalking Drone84%
$0.04↓#30041↓0.00↓10.7 years↑
"Devoid"
Unfathomable Truths84%
$0.22↓#9838↓0.122.3 years
"Devoid"
Void Attendant84%
$0.19↓#18901↓0.1111.0 years↑
"Devoid"
Complete Disregard84%
$0.05↓#24681↓0.33↑11.0 years↑
"Devoid"
Oblivion Strike84%
$0.04↓#20804↓0.07↓10.7 years↑
"Devoid"
Blinding Drone84%
$0.09↓#23775↓0.1910.7 years↑
"Devoid"
Maw of Kozilek84%
$0.09↓#30120↓0.65↑10.7 years↑
"Devoid"
Reality Hemorrhage83%
$0.05↓#27904↓0.00↓10.7 years↑
"Devoid"
Inverter of Truth83%
$1.10↑#13196↓0.48↑10.7 years↑
"Devoid"
Sky Scourer83%
$0.09↓#28543↓0.00↓10.7 years↑
"Devoid"
Havoc Sower83%
$0.06↓#31203↓0.00↓10.7 years↑
"Devoid"
Grave Birthing83%
$0.09↓#18501↓0.1211.0 years↑
"Devoid"