The Ur-Dragon 
Legendary Creature — Dragon Avatar
$34.67 #2673 1.99 9.2 years
Eminence — As long as The Ur-Dragon is in the command zone or on the battlefield, other Dragon spells you cast cost 
less to cast.
less to cast.Flying
Whenever one or more Dragons you control attack, draw that many cards, then you may put a permanent card from your hand onto the battlefield.
Click a line or tag to filter
Cards similar to The Ur-Dragon 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.
Dragonlord's Servant84%
$0.19↓#1346↑0.21↓11.6 years↑
"Dragon spells you cast cost less to cast."
less to cast."
Dragonspeaker Shaman84%
$0.36↓#1313↑0.29↓23.4 years↑
"Dragon spells you cast cost 
less to cast."
less to cast."
Lady of Laughter80%
$0.33↓#19883↓0.07↓3.1 years↓
"Flying"
Acolyte of Bahamut79%
$0.20↓#9427↓0.30↓4.4 years↓
"Commander creatures you own have "The first Dragon spell you cast each turn costs less to cast.""
less to cast.""
Sarkhan, Soul Aflame77%
$0.80↓#2074↑0.34↓3.4 years↓
"Dragon spells you cast cost less to cast."
less to cast."+1 more matching line
Nogi, Draco-Zealot77%
$0.34↓#4555↓0.00↓4.0 years↓
"Dragon spells you cast cost less to cast."
less to cast."+1 more matching line
Broodcaller Scourge76%
$0.60↓#3822↓0.42↓1.5 years↓
"Whenever one or more Dragons you control deal combat damage to a player, you may put a permanent card with mana value less than or equal to that damage from your hand onto the battlefield."
High-Society Hunter74%
$0.30↓#4368↓0.10↓1.9 years↓
"Flying"
Draconic Lore74%
$0.20↓#7945↓0.24↓4.4 years↓
"This spell costs less to cast if you control a Dragon."
less to cast if you control a Dragon."
The Ur-Sphinx74%
$1.37↓#12241↓0.87↓0.0 years↓
"As long as this card is in the command zone or on the battlefield, other Sphinx spells you cast cost less to cast."
less to cast."
Stormchaser Drake74%
$0.32↓#9064↓0.07↓4.9 years↓
"Flying"
Whirlwing Stormbrood // Dynamic Soar72%
$0.17↓#6602↓0.07↓1.5 years↓
"Flying"
Filigree Angel72%
$0.24↓#15101↓0.53↓17.5 years↑
"Flying"
Sire of the Storm72%
$0.08↓#16792↓0.06↓22.1 years↑
"Flying"
Consecrated Sphinx70%
$25.11↓#653↑1.82↓15.7 years↑
"Flying"
Dromoka, the Eternal70%
$0.34↓#9680↓0.00↓11.7 years↑
"Whenever a Dragon you control attacks, bolster 2."
Archon of Coronation70%
$0.49↓#6727↓0.76↓5.9 years↓
"Flying"
Returned Pastcaller70%
$0.15↓#22610↓0.47↓5.5 years↓
"Flying"