Surrakar Spellblade {1}{U}{U}
Creature — Surrakar
Whenever you cast an instant or sorcery spell, you may put a charge counter on this creature.
Whenever this creature deals combat damage to a player, you may draw X cards, where X is the number of charge counters on it.
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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.
Adaptive Training Post 85%
$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."
Fluxcharger 85%
$0.10#27778
"Whenever you cast an instant or sorcery spell, you may switch this creature's power and toughness until end of turn."
Haunting Figment 84%
$0.08#24057
"This creature can't be blocked as long as you've cast an instant or sorcery spell this turn."
Primal Amulet // Primal Wellspring 83%
$13.51#2071
"Whenever you cast an instant or sorcery spell, put a charge counter on this artifact. Then if there are four or more charge counters on it, you may remove those counters and transform it."
Firemind's Research 83%
$0.31#12997
"Whenever you cast an instant or sorcery spell, put a charge counter on this enchantment."
Geistflame Reservoir 82%
$0.18#16934
"Whenever you cast an instant or sorcery spell, put a charge counter on this artifact."
Cold-Eyed Selkie 82%
$0.37#1998
"Whenever this creature deals combat damage to a player, you may draw that many cards."
Suffocation 81%
$0.15#31137
"Cast this spell only if you were dealt damage this turn by a red instant or sorcery spell."
Smoldering Egg // Ashmouth Dragon 81%
$0.36#10184
"Whenever you cast an instant or sorcery spell, put a number of ember counters on this creature equal to the amount of mana spent to cast that spell. Then if this creature has seven or more ember counters on it, remove them and transform this creature."
Baral and Kari Zev 81%
$0.24#6953
"Whenever you cast your first instant or sorcery spell each turn, you may cast a spell with lesser mana value that shares a card type with it from your hand without paying its mana cost. If you don't, create First Mate Ragavan, a legendary 2/1 red Monkey Pirate creature token. It gains haste until end of turn."
Glint-Eye Nephilim 81%
$0.20#18168
"Whenever this creature deals combat damage to a player, draw that many cards."
Fear of Failed Tests 81%
$0.24#12075
"Whenever this creature deals combat damage to a player, draw that many cards."
Stormsplitter 81%
$2.81#3865
"Whenever you cast an instant or sorcery spell, create a token that's a copy of this creature. Exile that token at the beginning of the next end step."
Efreet Flamepainter 80%
$0.24#15040
"Whenever this creature deals combat damage to a player, you may cast target instant or sorcery card from your graveyard without paying its mana cost. If that spell would be put into your graveyard, exile it instead."
Swarm Intelligence 80%
$0.39#4549
"Whenever you cast an instant or sorcery spell, you may copy that spell. You may choose new targets for the copy."