Dragon's Disciple 

Creature — Human Monk
$0.20 #19261 0.27 5.1 years
As this creature enters, you may reveal a Dragon card from your hand. If you do or if you control a Dragon, this creature enters with a +1/+1 counter on it.
Dragons you control have ward
. (Whenever a Dragon you control becomes the target of a spell or ability an opponent controls, counter it unless that player pays
.)
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Cards similar to Dragon's Disciple 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.
Scaleguard Sentinels94%
$0.09↓#28900↓0.00↓11.4 years↑
"This creature enters with a +1/+1 counter on it if you revealed a Dragon card or controlled a Dragon as you cast this spell."
+1 more matching line
Orator of Ojutai82%
$0.16↓#14324↑0.55↑11.7 years↑
"As an additional cost to cast this spell, you may reveal a Dragon card from your hand."
Temple of the Dragon Queen82%
$0.32↑#2536↑0.07↓5.1 years
"As this land enters, you may reveal a Dragon card from your hand. This land enters tapped unless you revealed a Dragon card this way or you control a Dragon."
Foul-Tongue Invocation82%
$0.13↓#23636↓0.2911.4 years↑
"As an additional cost to cast this spell, you may reveal a Dragon card from your hand."
Draconic Roar80%
$0.14↓#194520.13↓11.4 years↑
"As an additional cost to cast this spell, you may reveal a Dragon card from your hand."
+1 more matching line
Dragonlord's Prerogative80%
$0.25↑#198350.44↑11.4 years↑
"As an additional cost to cast this spell, you may reveal a Dragon card from your hand."
+1 more matching line
Silumgar's Scorn78%
$0.22↑#13136↑0.2111.4 years↑
"As an additional cost to cast this spell, you may reveal a Dragon card from your hand."
+1 more matching line
Sarkhan, Dragon Ascendant78%
$0.35↑#7477↑0.181.4 years↓
"Whenever a Dragon you control enters, put a +1/+1 counter on this card. Until end of turn, this card becomes a Dragon in addition to its other types and gains flying."
+1 more matching line
Call the Spirit Dragons72%
$3.09↑#4624↑0.76↑1.4 years↓
"At the beginning of your upkeep, for each color, put a +1/+1 counter on a Dragon you control of that color. If you put +1/+1 counters on five Dragons this way, you win the game."
+1 more matching line
Kargan Dragonrider70%
$0.07↓#25055↓0.228.1 years↑
"As long as you control a Dragon, this creature has flying."
Gold-Forged Thopteryx70%
$0.28↑#2599↑0.233.3 years↓
"Each legendary permanent you control has ward
."
Flowering of the White Tree70%
$11.80↑#800↑0.42↑3.2 years↓
"Legendary creatures you control get +2/+1 and have ward
."
Coppercoat Vanguard70%
$0.28↑#4090↑0.323.3 years↓
"Each other Human you control gets +1/+0 and has ward
."
Acid-Spewer Dragon70%
$0.24↑#215510.2711.4 years↑
"When this creature is turned face up, put a +1/+1 counter on each other Dragon creature you control."
Herdchaser Dragon70%
$0.29↑#221170.00↓11.4 years↑
"When this creature is turned face up, put a +1/+1 counter on each other Dragon creature you control."
Belltoll Dragon70%
$0.13↓#210850.05↓11.4 years↑
"When this creature is turned face up, put a +1/+1 counter on each other Dragon creature you control."
Stormwing Dragon70%
$0.23↑#24548↓0.2911.4 years↑
"When this creature is turned face up, put a +1/+1 counter on each other Dragon creature you control."