Second Guess can’t be cast unless the spell it targets is the second spell cast this turn.
2012-05-01
wotc
Most spells and abilities that copy a spell create that copy on the stack. These copies are not cast and won’t count toward the number of spells cast that turn. However, a few (like Isochron Scepter’s ability) instruct you to copy a spell and “cast the copy.” These spells are cast and will count toward the number of spells cast that turn.
2012-05-01
wotc
It doesn’t matter if the first spell cast that turn has resolved yet or not. It also doesn’t matter how many spells have been cast after the second one, as long as the second spell cast is still on the stack.
Format Legality
Standard
Not Legal
Future
Not Legal
Historic
Not Legal
Timeless
Not Legal
Gladiator
Not Legal
Pioneer
Not Legal
Modern
Legal
Legacy
Legal
Pauper
Not Legal
Vintage
Legal
Penny
Not Legal
Commander
Legal
Oathbreaker
Legal
Standardbrawl
Not Legal
Brawl
Not Legal
Alchemy
Not Legal
Paupercommander
Not Legal
Duel
Legal
Oldschool
Not Legal
Premodern
Not Legal
Predh
Not Legal
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