Experiment Twelve 

Creature — Elf Lizard Warrior
$0.32 #7917 0.07 2.6 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.
Salt Road Ambushers89%
$0.10↓#11980↓0.75↑11.4 years↑
"Whenever another permanent you control is turned face up, if it's a creature, put two +1/+1 counters on it."
Sumala Sentry88%
$0.11↓#23164↓0.50↑2.6 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."
Offender at Large88%
$0.12↓#27089↓0.25↑2.6 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 Identity88%
$0.17↓#17091↓0.002.6 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 Farseer86%
$0.08↓#29780↓0.31↑23.3 years↑
"Whenever a permanent is turned face up, put a +1/+1 counter on this creature."
Pyrotechnic Performer84%
$0.23↓#11787↓0.122.6 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
Gadget Technician84%
$0.06↓#25765↓0.052.6 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 Ambusher83%
$0.09↓#23099↓0.40↑2.6 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%
$0.27↓#18836↓0.0019.3 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."
Growing Dread82%
$0.19↓#10758↓0.111.9 years
"Whenever you turn a permanent face up, put a +1/+1 counter on it."
Rakish Scoundrel82%
$0.09↓#23631↓0.53↑2.6 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."
Boltbender82%
$0.24↓#10315↓0.41↑2.6 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."
Printlifter Ooze81%
$0.31↓#83420.29↑2.6 years
"Whenever this creature or another creature you control is turned face up, create a 0/0 green Ooze creature token with trample. The token enters with X +1/+1 counters on it, where X is the number of other creatures you control."
+1 more matching line
Vengeful Creeper81%
$0.16↓#16172↓0.27↑2.6 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 Assailant80%
$0.09↓#25028↓0.33↑2.6 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."
Concealed Weapon80%
$0.17↓#21597↓0.002.6 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 Snoop80%
$0.13↓#23260↓0.20↑2.6 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 Savior80%
$0.12↓#21725↓0.57↑2.6 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."