Sphinx of the Final Word 


Creature — Sphinx
This spell can't be countered.
Flying
Hexproof (This creature can't be the target of spells or abilities your opponents control.)
Instant and sorcery spells you control can't be countered.
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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.
Overmaster 89%
$2.99#3095
"The next instant or sorcery spell you cast this turn can't be countered."
Mizzix of the Izmagnus 87%
$0.80#6271
"Instant and sorcery spells you cast cost {1} less to cast for each experience counter you have."
Harsh Judgment 83%
$0.40#29157
"If an instant or sorcery spell of the chosen color would deal damage to you, it deals that damage to its controller instead."
Font of Magic 82%
$0.41#12045
"Instant and sorcery spells you cast cost {1} less to cast for each time you've cast a commander from the command zone this game."
Adaptive Training Post 82%
$0.24#8625
"Whenever you cast an instant or sorcery spell, if this artifact has fewer than three charge counters on it, put a charge counter on it."
Pyromancer Ascension 81%
$0.28#11771
"Whenever you cast an instant or sorcery spell that has the same name as a card in your graveyard, you may put a quest counter on this enchantment."
Djinn Illuminatus 81%
$0.32#17031
"Each instant and sorcery spell you cast has replicate. The replicate cost is equal to its mana cost."
Heartflame Duelist // Heartflame Slash 81%
$0.29#10073
"Instant and sorcery spells you control have lifelink."
Lier, Disciple of the Drowned 81%
$0.43#2209
"Each instant and sorcery card in your graveyard has flashback. The flashback cost is equal to that card's mana cost."
+1 more matching line
Magnus the Red 81%
$15.23#6086
"Instant and sorcery spells you cast cost {1} less to cast for each creature token you control."
Vadrik, Astral Archmage 81%
$0.34#11429
"Instant and sorcery spells you cast cost {X} less to cast, where X is this card's power."
Sorcerer Class 80%
$2.98#3636
"Whenever you cast an instant or sorcery spell, that spell deals damage to each opponent equal to the number of instant and sorcery spells you've cast this turn."
Taigam, Ojutai Master 80%
$1.00#9267
"Whenever you cast an instant or sorcery spell from your hand, if this card attacked this turn, that spell gains rebound."
+1 more matching line
Academy Wall 80%
$0.27#13132
"Whenever you cast an instant or sorcery spell, you may draw a card. If you do, discard a card. This ability triggers only once each turn."