Spellshift 
Instant
$0.25 #26413 0.86 19.6 years
Counter target instant or sorcery spell. Its controller reveals cards from the top of their library until they reveal an instant or sorcery card. That player may cast that card without paying its mana cost. Then the player shuffles.
Click a line or tag to filter
Cards similar to Spellshift 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.
Psychic Rebuttal80%
$0.20↓#20057↑0.19↓11.1 years↓
"Counter target instant or sorcery spell that targets you."
Miscast76%
$1.20↑#2696↑0.31↓6.2 years↓
"Counter target instant or sorcery spell unless its controller pays ."
."
Flusterstorm74%
$4.99↑#307↑0.70↓15.2 years↓
"Counter target instant or sorcery spell unless its controller pays 
."
."
Molten Influence74%
$7.84↑#17581↑0.9124.9 years↑
"Counter target instant or sorcery spell unless its controller has this card deal 4 damage to them."
Muddle the Mixture74%
$1.84↑#694↑0.44↓20.9 years↑
"Counter target instant or sorcery spell."
Disrupt74%
$0.27↑#10216↑0.43↓29.2 years↑
"Counter target instant or sorcery spell unless its controller pays ."
."
Extinguish74%
$0.25#279360.60↓28.2 years↑
"Counter target sorcery spell."
Envelop74%
$3.31↑#20582↑0.60↓24.3 years↑
"Counter target sorcery spell."
Dispel74%
$0.28↑#919↑0.33↓16.6 years↓
"Counter target instant spell."
Talent of the Telepath72%
$0.65↑#10314↑0.65↓11.1 years↓
"Target opponent reveals the top seven cards of their library. You may cast an instant or sorcery spell from among them without paying its mana cost. Then that player puts the rest into their graveyard."
Obscura Charm72%
$0.22↓#8540↑0.29↓4.4 years↓
"• Counter target instant or sorcery spell."
Judge's Familiar70%
$0.23↓#5502↑0.45↓13.9 years↓
"Sacrifice this creature: Counter target instant or sorcery spell unless its controller pays ."
."
Cursecatcher70%
$0.44↑#11621↑0.67↓18.3 years↓
"Sacrifice this creature: Counter target instant or sorcery spell unless its controller pays ."
."