Jet Medallion 
Artifact
$12.06 #278 0.22 28.9 years
Black spells you cast cost 
less to cast.
less to cast.Click a line or tag to filter
Cards similar to Jet Medallion 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.
Thunderscape Familiar94%
$0.25↓#15646↓0.2725.6 years↓
"Black spells and green spells you cast cost less to cast."
less to cast."
Stormscape Familiar92%
$0.94↓#6811↓0.1425.6 years↓
"White spells and black spells you cast cost less to cast."
less to cast."
The Darkness Crystal86%
$4.24↓#1226↓0.66↑1.2 years↓
"Black spells you cast cost less to cast."
less to cast."
Bontu's Monument84%
$4.11↓#676↓0.259.4 years↓
"Black creature spells you cast cost less to cast."
less to cast."
Ashenmoor Cohort82%
$0.14↓#31312↓0.2718.3 years↓
"This creature gets +1/+1 as long as you control another black creature."
Stone Calendar80%
$14.67↑#20270↓0.48↑32.1 years↑
"Spells you cast cost less to cast."
less to cast."
Memory Crystal80%
$2.14↓#23969↓0.60↑28.2 years
"Buyback costs cost less."
less."
Rowan, Scion of War80%
$0.43↓#8750↓0.43↑3.0 years↓
"
: Spells you cast this turn that are black and/or red cost 
less to cast, where X is the amount of life you lost this turn. Activate only as a sorcery."
: Spells you cast this turn that are black and/or red cost less to cast, where X is the amount of life you lost this turn. Activate only as a sorcery."
Marshmist Titan78%
$0.10↓#22003↓0.42↑12.6 years↓
"This spell costs less to cast, where X is your devotion to black."
less to cast, where X is your devotion to black."
Defiler of Flesh78%
$0.45↓#5608↓0.194.0 years↓
"As an additional cost to cast black permanent spells, you may pay 2 life. Those spells cost 
less to cast if you paid life this way. This effect reduces only the amount of black mana you pay."
less to cast if you paid life this way. This effect reduces only the amount of black mana you pay."
Drag to the Underworld78%
$0.18↓#12957↓0.266.6 years↓
"This spell costs less to cast, where X is your devotion to black."
less to cast, where X is your devotion to black."
Dread Charge76%
$0.73↓#29004↓0.2229.3 years
"Black creatures you control can't be blocked this turn except by black creatures."
Ruby Medallion76%
$13.06↑#2910.2828.9 years
"Red spells you cast cost less to cast."
less to cast."
Sapphire Medallion76%
$7.39↓#365↓0.3028.9 years
"Blue spells you cast cost less to cast."
less to cast."
March of Wretched Sorrow75%
$0.36↓#9319↓0.39↑4.5 years↓
"As an additional cost to cast this spell, you may exile any number of black cards from your hand. This spell costs less to cast for each card exiled this way."
less to cast for each card exiled this way."
Pearl Medallion74%
$5.55↓#454↓0.2328.9 years
"White spells you cast cost less to cast."
less to cast."
Emerald Medallion74%
$4.07↓#586↓0.2028.9 years
"Green spells you cast cost less to cast."
less to cast."
Helm of Awakening72%
$1.51↓#1903↓0.36↑29.6 years
"Spells cost less to cast."
less to cast."
Uthros Psionicist72%
$0.31↓#9825↓0.231.1 years↓
"The second spell you cast each turn costs less to cast."
less to cast."
Raging Battle Mouse72%
$0.24↓#12241↓0.06↓3.0 years↓
"The second spell you cast each turn costs less to cast."
less to cast."