Hearth Elemental // Stoke Genius 
// 

Creature — Elemental // Sorcery — Adventure
This spell costs {X} less to cast, where X is the number of cards in your graveyard that are instant cards, sorcery cards, and/or have an Adventure.
Discard your hand, then draw two cards. (Then exile this card. You may cast the creature later from exile.)
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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.
Wilt in the Heat 85%
$0.10#24207
"This spell costs {2} less to cast if one or more cards left your graveyard this turn."
Blood for the Blood God! 85%
$9.67#3273
"Discard your hand, then draw eight cards. this card deals 8 damage to each opponent. Exile this card"
Scour the Laboratory 84%
$0.08#26115
"This spell costs {2} less to cast if there are four or more card types among cards in your graveyard."
+1 more matching line
Dusk Feaster 84%
$0.10#29187
"This spell costs {2} less to cast if there are four or more card types among cards in your graveyard."
Capricious Hellraiser 83%
$0.32#14452
"This spell costs {3} less to cast if you have nine or more cards in your graveyard."