Demonfire {X}{R}
Sorcery
Demonfire deals X damage to any target. If a creature dealt damage this way would die this turn, exile it instead.
Hellbent — If you have no cards in hand, this spell can't be countered and the damage can't be prevented.
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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.
Burn from Within 99%
$0.26#12416
"this card deals X damage to any target. If a creature is dealt damage this way, it loses indestructible until end of turn. If that creature would die this turn, exile it instead."
Disintegrate 99%
$0.51#15818
"this card deals X damage to any target. If it's a creature, it can't be regenerated this turn, and if it would die this turn, exile it instead."
Red Sun's Zenith 99%
$0.47#11897
"this card deals X damage to any target. If a creature dealt damage this way would die this turn, exile it instead. Shuffle this card into its owner's library."
Worldsoul's Rage 91%
$0.28#2678
"this card deals X damage to any target. Put up to X land cards from your hand and/or graveyard onto the battlefield tapped."
Electrodominance 91%
$0.24#1409
"this card deals X damage to any target. You may cast a spell with mana value X or less from your hand without paying its mana cost."
Titan's Revenge 91%
$0.32#25971
"this card deals X damage to any target. Clash with an opponent. If you win, return this card to its owner's hand."
Lava Burst 90%
#20742
"this card deals X damage to any target. If this card would deal damage to a creature, that damage can't be prevented or dealt instead to another permanent or player."
Drain Life 89%
$0.32#15452
"this card deals X damage to any target. You gain life equal to the damage dealt, but not more life than the player's life total before the damage was dealt, the planeswalker's loyalty before the damage was dealt, or the creature's toughness."
Soul Burn 87%
$0.08#24393
"this card deals X damage to any target. You gain life equal to the damage dealt, but not more than the amount of {B} spent on X, the player's life total before the damage was dealt, the planeswalker's loyalty before the damage was dealt, or the creature's toughness."