Thryx, the Sudden Storm 
Legendary Creature — Elemental Giant
$0.25 #3436 0.25 6.6 years
Flash (You may cast this spell any time you could cast an instant.)
Flying
Spells you cast with mana value 5 or greater cost 
less to cast and can't be countered.
less to cast and can't be countered.Click a line or tag to filter
Cards similar to Thryx, the Sudden Storm 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.
Krosan Drover80%
$0.19↓#13787↓0.1623.3 years↑
"Creature spells you cast with mana value 6 or greater cost 
less to cast."
less to cast."
Cunning Nightbonder80%
$0.25#10307↓0.256.4 years
"Spells with flash you cast cost less to cast and can't be countered."
less to cast and can't be countered."+1 more matching line
It That Heralds the End76%
$0.34↑#2330↑0.39↑2.2 years↓
"Colorless spells you cast with mana value 7 or greater cost less to cast."
less to cast."
Gaea's Herald76%
$1.18↑#12461↓1.40↑25.6 years↑
"Creature spells can't be countered."
Prowling Serpopard75%
$2.98↑#36350.349.4 years↑
"Creature spells you control can't be countered."
Insist74%
$2.06↑#17489↓0.07↓24.6 years↑
"The next creature spell you cast this turn can't be countered."
Vexing Shusher72%
$6.27↑#5497↓0.3518.3 years↑
"This spell can't be countered."
Spectacle Mage72%
$0.15↓#20964↓0.255.4 years↓
"Instant and sorcery spells you cast with mana value 5 or greater cost less to cast."
less to cast."
Leyline of Lifeforce72%
$6.06↑#13118↓0.40↑20.6 years↑
"Creature spells can't be countered."
Stone Calendar71%
$14.67↑#20270↓0.48↑32.1 years↑
"Spells you cast cost less to cast."
less to cast."
Faerie Invaders70%
$0.12↓#26820↓0.72↑14.1 years↑
"Flash"
Stormrider Spirit70%
$0.03↓#27994↓0.00↓10.4 years↑
"Flash"
Living Tempest70%
$0.08↓#29974↓0.43↑5.9 years
"Flash"
+1 more matching line
Aven Reedstalker70%
$0.03↓#28159↓0.00↓9.1 years↑
"Flash"
Spire Monitor70%
$0.04↓#30674↓0.06↓15.3 years↑
"Flash"
Sentinels of Glen Elendra70%
$0.10↓#27804↓0.40↑18.9 years↑
"Flash"
Vexing Gull70%
$0.07↓#25557↓0.05↓6.6 years
"Flash"
Nephalia Seakite70%
$0.06↓#29401↓0.2514.6 years↑
"Flash"
Kelinore Bat70%
$0.09↓#28728↓0.00↓17.1 years↑
"Flying"
Scion of Ugin70%
$0.10↓#23935↓0.40↑11.4 years↑
"Flying"