Archaic's Agony {4}{R}
Sorcery
Converge — Archaic's Agony deals X damage to target creature, where X is the number of colors of mana spent to cast this spell. Exile cards from the top of your library equal to the excess damage dealt to that creature this way. You may play those cards until the end of your next turn.
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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.
Frantic Firebolt 89%
$0.11#13066
"this card deals X damage to target creature, where X is 2 plus the number of cards in your graveyard that are instant cards, sorcery cards, and/or have an Adventure."
Galvanic Bombardment 87%
$0.05#27664
"this card deals X damage to target creature, where X is 2 plus the number of cards named this card in your graveyard."
Thunder Salvo 86%
$0.14#17409
"this card deals X damage to target creature, where X is 2 plus the number of other spells you've cast this turn."
Roku's Mastery 84%
$0.12#16105
"this card deals X damage to target creature. If X is 4 or more, scry 2."
Hell to Pay 83%
$0.42#2863
"this card deals X damage to target creature. Create a number of tapped Treasure tokens equal to the amount of excess damage dealt to that creature this way."
Goblin Negotiation 83%
$0.22#5528
"this card deals X damage to target creature. Create a number of 1/1 red Goblin creature tokens equal to the amount of excess damage dealt to that creature this way."