Eyeless Watcher 
Creature — Eldrazi Drone
$0.29 #10120 0.40 10.9 years
Devoid (This card has no color.)
When this creature enters, create two 1/1 colorless Eldrazi Scion creature tokens. They have "Sacrifice this token: Add 
."
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Cards similar to Eyeless Watcher 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.
Brood Monitor100%
$0.13↓#92050.26↓10.9 years
"When this creature enters, create three 1/1 colorless Eldrazi Scion creature tokens. They have "Sacrifice this token: Add .""
.""+1 more matching line
Birthing Hulk96%
$0.11↓#16133↓0.18↓10.6 years
"When this creature enters, create two 1/1 colorless Eldrazi Scion creature tokens. They have "Sacrifice this token: Add .""
.""+1 more matching line
Eldrazi Skyspawner96%
$0.12↓#12549↓0.05↓10.9 years
"When this creature enters, create a 1/1 colorless Eldrazi Scion creature token. It has "Sacrifice this token: Add .""
.""+1 more matching line
Incubator Drone96%
$0.06↓#20590↓0.71↑10.9 years
"When this creature enters, create a 1/1 colorless Eldrazi Scion creature token. It has "Sacrifice this token: Add .""
.""+1 more matching line
Scion Summoner96%
$0.08↓#15396↓0.08↓10.6 years
"When this creature enters, create a 1/1 colorless Eldrazi Scion creature token. It has "Sacrifice this token: Add .""
.""+1 more matching line
Dread Drone94%
$0.07↓#17328↓0.56↑16.4 years↑
"When this creature enters, create two 0/1 colorless Eldrazi Spawn creature tokens. They have "Sacrifice this token: Add .""
.""
Kozilek's Predator94%
$0.10↓#105480.06↓16.4 years↑
"When this creature enters, create two 0/1 colorless Eldrazi Spawn creature tokens. They have "Sacrifice this token: Add .""
.""
Emrakul's Hatcher94%
$0.22↓#7658↑0.19↓16.4 years↑
"When this creature enters, create three 0/1 colorless Eldrazi Spawn creature tokens. They have "Sacrifice this token: Add .""
.""
Call the Scions94%
$0.12↓#12852↓0.18↓10.9 years
"Create two 1/1 colorless Eldrazi Scion creature tokens. They have "Sacrifice this token: Add .""
.""+1 more matching line
Catacomb Sifter94%
$0.30↑#92140.18↓10.9 years
"When this creature enters, create a 1/1 colorless Eldrazi Scion creature token. It has "Sacrifice this token: Add .""
.""+1 more matching line
Vestige of Emrakul94%
$0.11↓#28743↓0.22↓10.9 years
"Devoid"
Brood Butcher92%
$0.24↓#18339↓0.3310.9 years
"When this creature enters, create a 1/1 colorless Eldrazi Scion creature token. It has "Sacrifice this token: Add .""
.""+1 more matching line
Eldrazi Repurposer92%
$0.23↓#93580.06↓2.2 years↓
"Devoid"
Nest Invader88%
$0.26↓#117980.5016.4 years↑
"When this creature enters, create a 0/1 colorless Eldrazi Spawn creature token. It has "Sacrifice this token: Add .""
.""
Grave Birthing88%
$0.11↓#18209↓0.17↓10.9 years
"Devoid"
Drowner of Hope88%
$0.18↓#7931↑0.59↑10.9 years
"When this creature enters, create two 1/1 colorless Eldrazi Scion creature tokens. They have "Sacrifice this token: Add .""
.""+1 more matching line
Kozilek's Translator88%
$0.08↓#25848↓0.3310.6 years
"Devoid"
Blinding Drone88%
$0.05↓#23538↓0.13↓10.6 years
"Devoid"
Oblivion Strike87%
$0.06↓#20491↓0.27↓10.6 years
"Devoid"
Stalking Drone87%
$0.04↓#29688↓0.00↓10.6 years
"Devoid"