Kasmina, Enigmatic Mentor 
Legendary Planeswalker — Kasmina
$0.23 #6351 0.50 7.5 years
Spells your opponents cast that target a creature or planeswalker you control cost 
more to cast.
more to cast.−2: Create a 2/2 blue Wizard creature token. Draw a card, then discard a card.
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Cards similar to Kasmina, Enigmatic Mentor 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.
Jubilant Skybonder84%
$0.18↓#61760.33↓6.5 years
"Creatures you control with flying have "Spells your opponents cast that target this creature cost more to cast.""
more to cast.""
Sphinx of New Prahv83%
$0.18↓#24374↓0.33↓7.7 years
"Spells your opponents cast that target this creature cost more to cast."
more to cast."
Boreal Elemental83%
$0.18↓#29307↓0.00↓7.3 years
"Spells your opponents cast that target this creature cost more to cast."
more to cast."
Callaphe, Beloved of the Sea78%
$0.22↓#7775↓0.13↓6.7 years
"Creatures and enchantments you control have "Spells your opponents cast that target this permanent cost 
more to cast.""
more to cast.""
Icefall Regent77%
$0.42↑#13327↓0.83↑11.6 years↑
"Spells your opponents cast that target this creature cost more to cast."
more to cast."
Urza, Planeswalker76%
3.9 years↓
"+1: Draw two cards, then discard a card."
Syr Elenora, the Discerning76%
$0.11↓#14382↓0.27↓7.0 years
"Spells your opponents cast that target this card cost more to cast."
more to cast."
Elderwood Scion75%
$0.27↑#23834↓0.00↓14.4 years↑
"Spells your opponents cast that target this creature cost more to cast."
more to cast."
Esior, Wardwing Familiar75%
$0.54↑#3438↑0.445.9 years↓
"Spells your opponents cast that target one or more commanders you control cost more to cast."
more to cast."
Charix, the Raging Isle74%
$0.38↑#3703↑0.18↓6.1 years↓
"Spells your opponents cast that target this card cost more to cast."
more to cast."
Pursued Whale74%
$0.22↓#16753↓0.15↓6.3 years↓
"Spells your opponents cast that target this creature cost more to cast."
more to cast."
Kopala, Warden of Waves74%
$0.35↑#4211↑0.419.1 years↑
"Spells your opponents cast that target a Merfolk you control cost more to cast."
more to cast."
Monastery Siege74%
$0.68↑#60990.25↓11.7 years↑
"• Dragons — Spells your opponents cast that target you or a permanent you control cost more to cast."
more to cast."+1 more matching line