Experiment Twelve 

Creature — Elf Lizard Warrior
$0.33 #8293 0.00 2.7 years
Trample
Whenever this creature or another creature you control is turned face up, put +1/+1 counters on that creature equal to its power.
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.)
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Cards similar to Experiment Twelve 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 Large90%
$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."
Salt Road Ambushers89%
$0.10↓#12468↓0.0011.6 years↑
"Whenever another permanent you control is turned face up, if it's a creature, put two +1/+1 counters on it."
True Identity88%
$0.19↓#17625↓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."
Sumala Sentry88%
$0.09↓#23669↓0.12↑2.7 years
"Whenever a face-down permanent you control is turned face up, put a +1/+1 counter on it and a +1/+1 counter on this creature."
Gadget Technician86%
$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."
Aven Farseer85%
$0.08↓#29968↓0.0023.4 years↑
"Whenever a permanent is turned face up, put a +1/+1 counter on this creature."
Culvert Ambusher85%
$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."
Pyrotechnic Performer84%
$0.23↓#12180↓0.062.7 years
"Whenever this creature or another creature you control is turned face up, that creature deals damage equal to its power to each opponent."
+1 more matching line
Boltbender84%
$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."
Unblinking Bleb83%
$0.28↓#19394↓0.11↑19.5 years↑
"Morph 
You may cast this card face down as a 2/2 creature for
. Turn it face up any time for its morph cost."
Vengeful Creeper82%
$0.14↓#16635↓0.44↑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."
Alley Assailant82%
$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."
Growing Dread82%
$0.21↓#11469↓0.22↑2.1 years
"Whenever you turn a permanent face up, put a +1/+1 counter on it."
Concealed Weapon82%
$0.15↓#21939↓0.27↑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 Scoundrel82%
$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."
Faerie Snoop82%
$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."
Sanguine Savior82%
$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."
Mistway Spy80%
$0.11↓#19003↓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."
Forum Familiar80%
$0.09↓#21387↓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."