Maelstrom Muse 
Creature — Djinn Wizard
$0.14 #21865 0.13 5.4 years
Flying
Whenever this creature attacks, the next instant or sorcery spell you cast this turn costs 
less to cast, where X is this creature's power as this ability resolves.
less to cast, where X is this creature's power as this ability resolves.Click a line or tag to filter
Cards similar to Maelstrom Muse 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.
Vadrik, Astral Archmage86%
$0.21↑#11638↑0.65↑4.9 years
"Instant and sorcery spells you cast cost less to cast, where X is this card's power."
less to cast, where X is this card's power."
Spellbinding Soprano81%
$0.27↑#191600.194.4 years↓
"Whenever this creature attacks, instant and sorcery spells you cast this turn cost less to cast."
less to cast."
Mocking Sprite80%
$0.18↑#2866↑0.163.0 years↓
"Instant and sorcery spells you cast cost less to cast."
less to cast."+1 more matching line
Goblin Electromancer80%
$0.21↑#661↑0.26↑14.0 years↑
"Instant and sorcery spells you cast cost less to cast."
less to cast."
The Scarlet Witch80%
$0.48↑#11334↑0.00↓0.2 years↓
"Instant and sorcery spells you cast with mana value 4 or greater cost less to cast, where X is this card's power."
less to cast, where X is this card's power."
Storm Skreelix79%
$0.17↑#181050.184.9 years
"Instant and sorcery spells you cast cost less to cast."
less to cast."
Messenger Falcons79%
$0.18↑#28353↓0.24↑17.3 years↑
"Flying"
Arcane Melee78%
$0.35↑#11492↑0.30↑14.3 years↑
"Instant and sorcery spells cost 
less to cast."
less to cast."
Wings of the Guard76%
$0.14#239120.2010.0 years↑
"Flying"
Syr Faren, the Hengehammer76%
$0.22↑#16218↑0.31↑6.9 years↑
"Whenever this card attacks, another target attacking creature gets +X/+X until end of turn, where X is this card's power."
Shrieking Specter76%
$1.01↑#30868↓0.47↑27.2 years↑
"Flying"
Stormcatch Mentor76%
$0.33↑#943↑0.24↑2.1 years↓
"Instant and sorcery spells you cast cost less to cast."
less to cast."
Tuya Bearclaw75%
$0.26↑#10523↑0.24↑5.8 years
"Whenever this card attacks, it gets +X/+X until end of turn, where X is the greatest power among other creatures you control."
Rubblebelt Rioters75%
$0.19↑#181060.127.3 years↑
"Whenever this creature attacks, it gets +X/+0 until end of turn, where X is the greatest power among creatures you control."
Iron-Craw Crusher75%
$0.20↑#183430.00↓3.8 years↓
"Whenever this creature attacks, target attacking creature gets +X/+0 until end of turn, where X is this creature's power."
Archmage of Runes75%
$3.31↑#954↑0.31↑1.8 years↓
"Instant and sorcery spells you cast cost less to cast."
less to cast."
Hardened Berserker74%
$0.03↓#240460.0611.4 years↑
"Whenever this creature attacks, the next spell you cast this turn costs less to cast."
less to cast."
Firebird, Blazing Ranger74%
$0.26↑#16220↑0.00↓0.2 years↓
"Whenever this card attacks, other attacking creatures get +X/+0 until end of turn, where X is this card's power."
Jace's Sanctum74%
$0.58↑#4173↑0.34↑11.1 years↑
"Instant and sorcery spells you cast cost less to cast."
less to cast."
Shadewing Laureate74%
$0.11↓#219990.29↑5.4 years
"Flying"