Maelstrom Muse 
Creature — Djinn Wizard
$0.17 #22204 0.14 5.5 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.
War Machine, Legacy of Iron88%
$0.16↓#209950.200.3 years↓
"Flying"
Vadrik, Astral Archmage86%
$0.26↑#11818↑0.215.1 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 Soprano82%
$0.23↑#194680.144.5 years↓
"Whenever this creature attacks, instant and sorcery spells you cast this turn cost less to cast."
less to cast."
Mocking Sprite80%
$0.19↑#2898↑0.083.1 years↓
"Instant and sorcery spells you cast cost less to cast."
less to cast."
Goblin Electromancer80%
$0.21↑#673↑0.2314.1 years↑
"Instant and sorcery spells you cast cost less to cast."
less to cast."
The Scarlet Witch80%
$0.38↑#10270↑0.55↑0.3 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."
Aurelia, Exemplar of Justice80%
$1.28↑#8421↑0.50↑8.0 years↑
"Flying"
Light of the Legion79%
$0.26↑#16832↑0.118.0 years↑
"Flying"
Arcane Melee78%
$0.37↑#11690↑0.32↑14.5 years↑
"Instant and sorcery spells cost 
less to cast."
less to cast."
Filigree Angel77%
$0.24↑#15101↑0.53↑17.5 years↑
"Flying"
Syr Faren, the Hengehammer76%
$0.25↑#16530↑0.00↓7.0 years↑
"Whenever this card attacks, another target attacking creature gets +X/+X until end of turn, where X is this card's power."
Stormcatch Mentor76%
$0.33↑#949↑0.29↑2.2 years↓
"Instant and sorcery spells you cast cost less to cast."
less to cast."
Tuya Bearclaw75%
$0.24↑#10807↑0.43↑5.9 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%
$0.24↑#183840.137.5 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%
$0.19↑#187570.063.9 years↓
"Whenever this creature attacks, target attacking creature gets +X/+0 until end of turn, where X is this creature's power."
Storm Skreelix75%
$0.20↑#185370.075.1 years
"Instant and sorcery spells you cast cost less to cast."
less to cast."+1 more matching line
Archmage of Runes75%
$3.31↑#924↑0.33↑1.9 years↓
"Instant and sorcery spells you cast cost less to cast."
less to cast."
Hardened Berserker74%
$0.04↓#243520.00↓11.6 years↑
"Whenever this creature attacks, the next spell you cast this turn costs less to cast."
less to cast."
Firebird, Blazing Ranger74%
$0.21↑#15284↑0.150.3 years↓
"Whenever this card attacks, other attacking creatures get +X/+0 until end of turn, where X is this card's power."
+1 more matching line
Melek, Reforged Researcher74%
$0.53↑#12752↑0.44↑2.7 years↓
"The first instant or sorcery spell you cast each turn costs 
less to cast."
less to cast."