Refraction Trap 
Instant — Trap
$0.05 #29329 0.00 16.6 years
If an opponent cast a red instant or sorcery spell this turn, you may pay rather than pay this spell's mana cost.
rather than pay this spell's mana cost.Prevent the next 3 damage that a source of your choice would deal to you and/or permanents you control this turn. If damage is prevented this way, Refraction Trap deals that much damage to any target.
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Cards similar to Refraction Trap 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.
Divine Deflection95%
$0.26↑#19938↑0.0614.3 years↓
"Prevent the next X damage that would be dealt to you and/or permanents you control this turn. If damage is prevented this way, this card deals that much damage to any target."
Harm's Way91%
$0.08↑#282090.27↑17.1 years
"The next 2 damage that a source of your choice would deal to you and/or permanents you control this turn is dealt to any target instead."
Channel Harm87%
$0.18↑#21259↑0.28↑11.6 years↓
"Prevent all damage that would be dealt to you and permanents you control this turn by sources you don't control. If damage is prevented this way, you may have this card deal that much damage to target creature."
Acolyte's Reward80%
$0.18↑#18706↑0.0012.6 years↓
"Prevent the next X damage that would be dealt to target creature this turn, where X is your devotion to white. If damage is prevented this way, this card deals that much damage to any target."
Shining Shoal78%
$1.90↑#22797↑0.27↑21.6 years↑
"The next X damage that a source of your choice would deal to you and/or creatures you control this turn is dealt to any target instead."
Palisade Giant78%
$0.27↑#16404↑0.40↑13.9 years↓
"All damage that would be dealt to you and other permanents you control is dealt to this creature instead."
Honorable Passage77%
$0.23↑#246990.33↑29.6 years↑
"The next time a source of your choice would deal damage to any target this turn, prevent that damage. If damage from a red source is prevented this way, this card deals that much damage to the source's controller."
Harsh Judgment77%
$0.40↑#293870.44↑25.9 years↑
"If an instant or sorcery spell of the chosen color would deal damage to you, it deals that damage to its controller instead."
Comeuppance76%
$4.53↑#3044↑0.44↑11.8 years↓
"Prevent all damage that would be dealt to you and planeswalkers you control this turn by sources you don't control. If damage from a creature source is prevented this way, this card deals that much damage to that creature. If damage from a noncreature source is prevented this way, this card deals that much damage to the source's controller."
Suffocation74%
$0.18↑#314150.40↑30.2 years↑
"Cast this spell only if you were dealt damage this turn by a red instant or sorcery spell."
Kor Dirge74%
$0.21↑#23279↑0.24↑19.6 years↑
"All damage that would be dealt this turn to target creature you control by a source of your choice is dealt to another target creature instead."
Kor Chant74%
$0.18↑#236830.50↑28.2 years↑
"All damage that would be dealt this turn to target creature you control by a source of your choice is dealt to another target creature instead."
Endure74%
$0.18↑#270900.33↑18.1 years↑
"Prevent all damage that would be dealt to you and permanents you control this turn."
Captain's Maneuver74%
$0.15↑#243690.0725.3 years↑
"The next X damage that would be dealt to target creature, planeswalker, or player this turn is dealt to another target creature, planeswalker, or player instead."
Gisela, Blade of Goldnight73%
$4.91↑#1133↑0.75↑14.4 years↓
"If a source would deal damage to an opponent or a permanent an opponent controls, that source deals double that damage to that player or permanent instead."
Aegis of Honor73%
$2.62↑#21234↑0.38↑24.9 years↑
"
: The next time an instant or sorcery spell would deal damage to you this turn, that spell deals that damage to its controller instead."
: The next time an instant or sorcery spell would deal damage to you this turn, that spell deals that damage to its controller instead."
Deflecting Palm72%
$2.48↑#1138↑0.51↑11.9 years↓
"The next time a source of your choice would deal damage to you this turn, prevent that damage. If damage is prevented this way, this card deals that much damage to that source's controller."
Carom72%
$0.04↓#21858↑0.0020.3 years↑
"The next 1 damage that would be dealt to target creature this turn is dealt to another target creature instead."
Vengeful Archon72%
$0.26↑#256200.56↑16.1 years
"
: Prevent the next X damage that would be dealt to you this turn. If damage is prevented this way, this creature deals that much damage to target player or planeswalker."
: Prevent the next X damage that would be dealt to you this turn. If damage is prevented this way, this creature deals that much damage to target player or planeswalker."
Gideon's Intervention72%
$0.27↑#20742↑0.56↑9.4 years↓
"Prevent all damage that would be dealt to you and permanents you control by sources with the chosen name."