Change the Equation 
Instant
$0.25 #14150 0.32 3.4 years
Choose one —
• Counter target spell with mana value 2 or less.
• Counter target red or green spell with mana value 6 or less.
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Cards similar to Change the Equation 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.
Flashfreeze92%
$0.10↓#20286↓0.15↓20.1 years↑
"Counter target red or green spell."
Minor Misstep82%
$0.17↓#147201.00↑3.6 years
"Counter target spell with mana value 1 or less."
Thoughtbind82%
$0.05↓#29397↓0.3321.9 years↑
"Counter target spell with mana value 4 or less."
Spell Snare78%
$0.42↑#8442↑0.3920.3 years↑
"Counter target spell with mana value 2."
Wilderness Hypnotist78%
$0.08↓#31697↓0.2918.1 years↑
"
: Target red or green creature gets -2/-0 until end of turn."
: Target red or green creature gets -2/-0 until end of turn."
Alabaster Potion78%
$0.11↓#22503↓0.00↓32.3 years↑
"Choose one —"
Healing Leaves78%
$0.15↓#27482↓0.57↑19.6 years↑
"Choose one —"
Amazing Acrobatics78%
$0.27↑#4305↑0.411.0 years↓
"• Counter target spell."
+1 more matching line
Urza's Rebuff78%
$0.16↓#9356↑0.56↑3.8 years
"• Counter target spell."
+1 more matching line
Blue Elemental Blast76%
$1.05↑#10860↑0.44↑33.1 years↑
"• Counter target red spell."
+1 more matching line
Mouser Attack!76%
$0.13↓#21533↓0.00↓0.5 years↓
"Choose one —"
Debt to the Kami76%
$0.28↑#154120.06↓4.5 years↑
"Choose one —"
Spellgyre76%
$0.18↓#8079↑0.00↓2.1 years↓
"• Counter target spell."
+1 more matching line
Hydroblast76%
$3.85↑#125500.3331.3 years↑
"• Counter target spell if it's red."
+1 more matching line
Pharika's Libation76%
$0.18↓#135650.53↑6.6 years↑
"Choose one —"
Parch76%
$0.12↓#30595↓0.05↓27.6 years↑
"Choose one —"
Invigorated Rampage76%
$0.18↓#10055↑0.299.6 years↑
"Choose one —"
Unbury76%
$0.24↓#8596↑0.00↓0.6 years↓
"Choose one —"
Alley Evasion76%
$0.10↓#19899↓0.389.6 years↑
"Choose one —"
You Come to the Gnoll Camp76%
$0.20↓#17856↓0.275.1 years↑
"Choose one —"