Light Up the Night 

Sorcery
Light Up the Night deals X damage to any target. It deals X plus 1 damage instead if that target is a creature or planeswalker.
Flashback—{3}{R}, Remove X loyalty counters from among planeswalkers you control. If you cast this spell this way, X can't be 0. (You may cast this card from your graveyard for its flashback cost. Then exile 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.
Titan's Revenge 96%
$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."
Worldsoul's Rage 96%
$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."
Lava Burst 96%
#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."
Electrodominance 95%
$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."
Drain Life 93%
$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 93%
$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."
Burn from Within 87%
$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."