Spellshock {2}{R}
Enchantment
Whenever a player casts a spell, this enchantment deals 2 damage to that player.
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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.
Roiling Vortex 84%
$1.57#2453
"Whenever a player casts a spell, if no mana was spent to cast that spell, this enchantment deals 5 damage to that player."
Shadow in the Warp 82%
$19.36#3344
"Whenever an opponent casts their first noncreature spell each turn, this enchantment deals 2 damage to that player."