Arcane Melee {4}{U}
Enchantment
Instant and sorcery spells cost {2} less to cast.
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Cards that do something similar 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.
Primal Amulet // Primal Wellspring 96%
$13.51#2071
"Instant and sorcery spells you cast cost {1} less to cast."
Case of the Ransacked Lab 96%
$0.48#2607
"Instant and sorcery spells you cast cost {1} less to cast."
Dirgur Focusmage // Braingeyser 96%
$0.30#10531
"Instant and sorcery spells you cast cost {1} less to cast."
Curious Homunculus // Voracious Reader 96%
$0.29#9383
"Instant and sorcery spells you cast cost {1} less to cast."
Rowan, Scholar of Sparks // Will, Scholar of Frost 96%
$2.01#11180
"Instant and sorcery spells you cast cost {1} less to cast."
Baral, Chief of Compliance 96%
$2.50#1315
"Instant and sorcery spells you cast cost {1} less to cast."
Ral, Monsoon Mage // Ral, Leyline Prodigy 96%
$6.29#3628
"Instant and sorcery spells you cast cost {1} less to cast."
Vadrik, Astral Archmage 91%
$0.34#11429
"Instant and sorcery spells you cast cost {X} less to cast, where X is this card's power."
Melek, Reforged Researcher 90%
#11940
"The first instant or sorcery spell you cast each turn costs {3} less to cast."
Spectacle Mage 90%
$0.17#20523
"Instant and sorcery spells you cast with mana value 5 or greater cost {1} less to cast."