The Master of Keys 
Legendary Enchantment Creature — Horror
$0.66 #4985 0.40 1.9 years
Flying
When The Master of Keys enters, put X +1/+1 counters on it and mill twice X cards.
Each enchantment card in your graveyard has escape. The escape cost is equal to the card's mana cost plus exile three other cards from your graveyard. (You may cast cards from your graveyard for their escape cost.)
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Cards similar to The Master of Keys 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.
Underworld Breach84%
$7.27↑#389↑1.81↑6.6 years↑
"Each nonland card in your graveyard has escape. The escape cost is equal to the card's mana cost plus exile three other cards from your graveyard."
Rescue Skiff79%
$0.17↓#12245↓0.17↓1.1 years
"Flying"
Blessed Spirits78%
$0.13↓#20632↓0.00↓11.1 years↑
"Flying"
Confession Dial76%
$0.28↓#14000↓0.322.9 years
"
: Target legendary creature card in your graveyard gains escape until end of turn. The escape cost is equal to its mana cost plus exile three other cards from your graveyard."
: Target legendary creature card in your graveyard gains escape until end of turn. The escape cost is equal to its mana cost plus exile three other cards from your graveyard."
Messenger Falcons76%
$0.18↓#28353↓0.24↓17.3 years↑
"Flying"
Worldheart Phoenix74%
$0.08↓#29897↓0.22↓17.6 years↑
"Flying"
The Grim Captain's Locker74%
$0.26↓#9754↓0.27↓2.8 years
": Until end of turn, each creature card in your graveyard gains "Escape—
, Exile four other cards from your graveyard.""
: Until end of turn, each creature card in your graveyard gains "Escape—, Exile four other cards from your graveyard.""
Aven Sunstriker74%
$0.24↓#17715↓0.00↓11.4 years↑
"Flying"
Tethered Griffin72%
$1.13↑#27632↓0.00↓27.2 years↑
"Flying"
Gisa and Geralf72%
$0.33↓#3955↑0.26↓10.1 years↑
"When this card enters, mill four cards."
Welcome to . . . // Jurassic Park72%
$26.53↑#55490.502.8 years
"Each Dinosaur card in your graveyard has escape. The escape cost is equal to the card's mana cost plus exile three other cards from your graveyard."
Emry, Lurker of the Loch71%
$0.63↓#605↑0.476.9 years↑
"When this card enters, mill four cards."
Shadewing Laureate70%
$0.11↓#21999↓0.29↓5.4 years↑
"Flying"