Unyielding Gatekeeper 

Creature — Elephant Cleric
$0.12 #16146 0.00 2.7 years
Disguise 
(You may cast this card face down for
as a 2/2 creature with ward
. Turn it face up any time for its disguise cost.)
When this creature is turned face up, exile another target nonland permanent. If you controlled it, return it to the battlefield tapped. Otherwise, its controller creates a 2/2 white and blue Detective creature token.
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Cards similar to Unyielding Gatekeeper 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.
Offender at Large78%
$0.15↑#27406↓0.062.7 years
"Disguise 
You may cast this card face down for
as a 2/2 creature with ward
. Turn it face up any time for its disguise cost."
Reduce to Memory78%
$0.26↑#166530.12↑5.5 years↑
"Exile target nonland permanent. Its controller creates a 3/2 red and white Spirit creature token."
Mistway Spy77%
$0.11↓#190030.062.7 years
"Disguise 
You may cast this card face down for
as a 2/2 creature with ward
. Turn it face up any time for its disguise cost."
Secure the Scene76%
$0.15↑#26620↓0.006.3 years↑
"Exile target nonland permanent. Its controller creates a 1/1 white Soldier creature token."
Vengeful Creeper76%
$0.14↑#166350.44↑2.7 years
"Disguise 
You may cast this card face down for
as a 2/2 creature with ward
. Turn it face up any time for its disguise cost."
Gadget Technician76%
$0.07↓#26149↓0.062.7 years
"Disguise 
You may cast this card face down for
as a 2/2 creature with ward
. Turn it face up any time for its disguise cost."
Sanguine Savior76%
$0.10↓#21979↓0.092.7 years
"Disguise 
You may cast this card face down for
as a 2/2 creature with ward
. Turn it face up any time for its disguise cost."
Faerie Snoop76%
$0.14↑#23639↓0.062.7 years
"Disguise 

You may cast this card face down for
as a 2/2 creature with ward
. Turn it face up any time for its disguise cost."
Alley Assailant76%
$0.08↓#25365↓0.002.7 years
"Disguise 

You may cast this card face down for
as a 2/2 creature with ward
. Turn it face up any time for its disguise cost."
Culvert Ambusher75%
$0.05↓#23535↓0.21↑2.7 years
"Disguise 
You may cast this card face down for
as a 2/2 creature with ward
. Turn it face up any time for its disguise cost."
Rakish Scoundrel75%
$0.08↓#23886↓0.072.7 years
"Disguise 

You may cast this card face down for
as a 2/2 creature with ward
. Turn it face up any time for its disguise cost."
Boltbender74%
$0.24↑#10587↑0.12↑2.7 years
"Disguise 
You may cast this card face down for
as a 2/2 creature with ward
. Turn it face up any time for its disguise cost."
Pyrotechnic Performer74%
$0.23↑#12180↑0.062.7 years
"Disguise
You may cast this card face down for
as a 2/2 creature with ward
. Turn it face up any time for its disguise cost."
Branch of Vitu-Ghazi74%
$0.27↑#7681↑0.062.7 years
"Disguise
You may cast this card face down for
as a 2/2 creature with ward
. Turn it face up any time for its disguise cost."
True Identity74%
$0.19↑#176250.062.7 years
"Disguise
You may cast this card face down for
as a 2/2 creature with ward
. Turn it face up any time for its disguise cost."
Bubble Smuggler74%
$0.06↓#21422↓0.002.7 years
"Disguise 
You may cast this card face down for
as a 2/2 creature with ward
. Turn it face up any time for its disguise cost."
Essence of Antiquity73%
$0.30↑#11258↑0.29↑2.7 years
"Disguise 
You may cast this card face down for
as a 2/2 creature with ward
. Turn it face up any time for its disguise cost."
Granite Witness72%
$0.05↓#25045↓0.002.7 years
"Disguise 
You may cast this card face down for
as a 2/2 creature with ward
. Turn it face up any time for its disguise cost."
Brago, King Eternal70%
$2.97↑#2330↑0.97↑12.4 years↑
"Whenever this card deals combat damage to a player, exile any number of target nonland permanents you control, then return those cards to the battlefield under their owner's control."