Insidious Will 
Instant
$0.42 #8823 0.20 10.1 years
Choose one —
• Counter target spell.
• You may choose new targets for target spell.
• Copy target instant or sorcery spell. You may choose new targets for the copy.
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Cards similar to Insidious Will expected a card that isn't here?
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"Copy target instant or sorcery spell. You may choose new targets for the copy."
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Dualcaster Mage88%
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"When this creature enters, copy target instant or sorcery spell. You may choose new targets for the copy."
Display of Power88%
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"Copy any number of target instant and/or sorcery spells. You may choose new targets for the copies."
Reiterate87%
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"Copy target instant or sorcery spell. You may choose new targets for the copy."
Mirror Sheen87%
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"
: Copy target instant or sorcery spell that targets you. You may choose new targets for the copy."
: Copy target instant or sorcery spell that targets you. You may choose new targets for the copy."
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"Copy target instant or sorcery spell. You may choose new targets for the copy."
Return the Favor86%
$0.83↑#568↑0.32↑2.5 years↓
"+ — Copy target instant spell, sorcery spell, activated ability, or triggered ability. You may choose new targets for the copy."
— Copy target instant spell, sorcery spell, activated ability, or triggered ability. You may choose new targets for the copy."+1 more matching line
Fork82%
$33.83↑#75870.2233.2 years↑
"Copy target instant or sorcery spell, except that the copy is red. You may choose new targets for the copy."
Flare of Duplication82%
$2.41↑#1141↑0.47↑2.3 years↓
"Copy target instant or sorcery spell. You may choose new targets for the copy."
Meletis Charlatan82%
$0.14↓#21605↓0.10↓13.1 years↑
", 
: The controller of target instant or sorcery spell copies it. That player may choose new targets for the copy."
, : The controller of target instant or sorcery spell copies it. That player may choose new targets for the copy."
Umezawa's Charm82%
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"Choose one —"
Choreographed Sparks82%
$0.27↓#101660.210.5 years↓
"• Copy target instant or sorcery spell you control. You may choose new targets for the copy."
+1 more matching line
Redirect82%
$0.33↓#91850.2916.3 years↑
"You may choose new targets for target spell."
Radiate82%
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"Choose target instant or sorcery spell that targets only a single permanent or player. Copy that spell for each other permanent or player the spell could target. Each copy targets a different one of those permanents and players."
Angrath's Rampage82%
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"Choose one —"
Venser, Fervent Forger81%
$0.31↓#16270↓0.32↑0.0 years↓
"• Copy target instant or sorcery spell an opponent controls twice. You may choose new targets for the copies."
Refuse // Cooperate81%
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"Copy target instant or sorcery spell. You may choose new targets for the copy."
Tempt with Mayhem81%
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"Choose target instant or sorcery spell. Each opponent may copy that spell and may choose new targets for the copy they control. You copy that spell once plus an additional time for each opponent who copied the spell this way. You may choose new targets for the copies you control."