Thorn of Amethyst 
Artifact
$0.56 #6540 1.06 18.9 years
Noncreature spells cost 
more to cast.
more to cast.Click a line or tag to filter
Cards similar to Thorn of Amethyst 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.
Glowrider100%
$2.14↑#15092↓1.18↑23.6 years↑
"Noncreature spells cost more to cast."
more to cast."
Thalia, Guardian of Thraben98%
$0.39↓#2316↑1.0214.6 years↓
"Noncreature spells cost more to cast."
more to cast."
Vryn Wingmare96%
$0.17↓#8253↓0.86↓11.1 years↓
"Noncreature spells cost more to cast."
more to cast."
Feroz's Ban90%
$0.36↓#21359↓1.0630.9 years↑
"Creature spells cost more to cast."
more to cast."
Charitable Levy88%
$0.17↓#70350.20↓2.2 years↓
"Noncreature spells cost more to cast."
more to cast."
Sphere of Resistance85%
$9.51↑#8361↓1.32↑28.2 years↑
"Spells cost more to cast."
more to cast."
Geist-Fueled Scarecrow83%
$0.10↓#25243↓0.35↓10.1 years↓
"Creature spells you cast cost more to cast."
more to cast."
Elspeth Conquers Death82%
$1.01↑#3056↑0.39↓6.6 years↓
"Noncreature spells your opponents cast cost more to cast until your next turn."
more to cast until your next turn."
Squeeze78%
$0.44↓#26115↓0.94↓26.9 years↑
"Sorcery spells cost 
more to cast."
more to cast."
Lodestone Golem77%
$0.30↓#71560.74↓16.6 years↓
"Nonartifact spells cost more to cast."
more to cast."
Alabaster Leech76%
$0.39↓#24981↓0.22↓25.9 years↑
"White spells you cast cost 
more to cast."
more to cast."
Defense Grid76%
$6.62↑#1899↑1.27↑27.6 years↑
"Each spell costs more to cast except during its controller's turn."
more to cast except during its controller's turn."
Sapphire Leech76%
$0.29↓#28281↓0.00↓25.9 years↑
"Blue spells you cast cost 
more to cast."
more to cast."
Chill76%
$2.22↑#21502↓0.9828.9 years↑
"Red spells cost more to cast."
more to cast."
Arachne, Psionic Weaver75%
$0.31↓#11410↓0.61↓1.0 years↓
"Spells of the chosen type cost more to cast."
more to cast."
Jade Leech75%
$0.29↓#31357↓0.00↓25.9 years↑
"Green spells you cast cost 
more to cast."
more to cast."
Sanctum Prelate75%
$0.63↑#9523↓1.0210.0 years↓
"Noncreature spells with mana value equal to the chosen number can't be cast."
Reidane, God of the Worthy // Valkmira, Protector's Shield74%
$0.44↓#63650.71↓5.6 years↓
"Noncreature spells your opponents cast with mana value 4 or greater cost more to cast."
more to cast."
Gaddock Teeg73%
$0.47↓#9399↓1.45↑18.9 years
"Noncreature spells with 
in their mana costs can't be cast."
in their mana costs can't be cast."
Mai, Scornful Striker73%
$1.17↑#5185↑0.00↓0.8 years↓
"Whenever a player casts a noncreature spell, they lose 2 life."