Tundra Fumarole 


Snow Sorcery
Tundra Fumarole deals 4 damage to target creature or planeswalker. Add {C} for each {S} spent to cast this spell. Until end of turn, you don't lose this mana as steps and phases end. ({S} is mana from a snow source.)
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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.
Hurloon Battle Hymn 97%
$0.16#21607
"this card deals 4 damage to target creature or planeswalker. If this spell was kicked, you gain 4 life."
Redcap Melee 97%
$0.23#25435
"this card deals 4 damage to target creature or planeswalker. If a nonred permanent is dealt damage this way, you sacrifice a land."
Rebel Salvo 89%
$0.21#11375
"this card deals 5 damage to target creature or planeswalker. That permanent loses indestructible until end of turn."
Soul Sear 89%
$0.27#13911
"this card deals 5 damage to target creature or planeswalker. That permanent loses indestructible until end of turn."
Fated Conflagration 89%
$0.12#23933
"this card deals 5 damage to target creature or planeswalker. If it's your turn, scry 2."
Rending Flame 88%
$0.17#23073
"this card deals 5 damage to target creature or planeswalker. If that permanent is a Spirit, this card also deals 2 damage to that permanent's controller."
Farideh's Fireball 88%
$0.22#9638
"this card deals 5 damage to target creature or planeswalker. Roll a d20."
Lithomantic Barrage 87%
$0.27#16769
"this card deals 1 damage to target creature or planeswalker. It deals 5 damage instead if that target is white and/or blue."
Flame Discharge 87%
$0.10#20651
"this card deals X damage to target creature or planeswalker. If you controlled a modified creature as you cast this spell, it deals X plus 2 damage instead."
Obliterating Bolt 87%
$0.15#14062
"this card deals 4 damage to target creature or planeswalker. If that creature or planeswalker would die this turn, exile it instead."