Retriever Phoenix 
Creature — Phoenix
$0.20 #26042 0.20 5.4 years
Flying, haste
When this creature enters, if you cast it, learn. (You may reveal a Lesson card you own from outside the game and put it into your hand, or discard a card to draw a card.)
As long as this card is in your graveyard, if you would learn, you may instead return this card to the battlefield.
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Cards similar to Retriever Phoenix 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.
Professor of Symbology82%
$0.17↓#260080.135.4 years
"When this creature enters, learn."
Gnarled Professor82%
$0.05↓#239540.215.4 years
"When this creature enters, learn."
Phoenix of Ash82%
$0.23↑#17106↑0.246.6 years↑
"Flying, haste"
Sparring Regimen77%
$0.26↑#17335↑0.00↓5.4 years
"When this enchantment enters, learn."
Poet's Quill76%
$0.27↑#17323↑0.255.4 years
"When this Equipment enters, learn."
Cram Session74%
$0.14↓#251960.31↑5.4 years
"Learn."
Guiding Voice72%
$0.14↓#237790.115.4 years
"Learn."
Pop Quiz72%
$0.15↓#248940.00↓5.4 years
"Learn."
Hunt for Specimens72%
$0.18↓#18219↑0.42↑5.4 years
"Learn."
Study Break71%
$0.10↓#249060.00↓5.4 years
"Learn."
Enthusiastic Study71%
$0.23↑#20125↑0.50↑5.4 years
"Learn."
Igneous Inspiration70%
$0.08↓#255160.07↓5.4 years
"Learn."
Arcane Subtraction70%
$0.07↓#255560.205.4 years
"Learn."
Nether Spirit70%
$0.28↑#253650.53↑26.9 years↑
"At the beginning of your upkeep, if this card is the only creature card in your graveyard, you may return this card to the battlefield."
First Day of Class70%
$0.19↓#10155↑0.52↑5.4 years
"Learn."