After the non-active player resolves a Bile Blight targeting a Brain Maggot. Player B passes priority back and after it is cast, and allows it to resolve, where in the comprehensive rules is it stated that a new game object also named Brain Maggot will be unaffected(in this case, the new game object came off of the stack after being cast from the active player's hand)
611.2c If a continuous effect generated by the resolution of a spell or ability modifies the
characteristics or changes the controller of any objects, the set of objects it affects is determined
when that continuous effect begins. After that point, the set won’t change. (Note that this works
differently than a continuous effect from a static ability.) A continuous effect generated by the
resolution of a spell or ability that doesn’t modify the characteristics or change the controller of
any objects modifies the rules of the game, so it can affect objects that weren’t affected when
that continuous effect began. If a single continuous effect has parts that modify the
characteristics or changes the controller of any objects and other parts that don’t, the set of
objects each part applies to is determined independently. Example: An effect that reads “All white creatures get +1/+1 until end of turn” gives
the bonus to all permanents that are white creatures when the spell or ability resolves—
even if they change color later—and doesn’t affect those that enter the battlefield or turn
white afterward.
Example: An effect that reads “Prevent all damage creatures would deal this turn”
doesn’t modify any object’s characteristics, so it’s modifying the rules of the game. That
means the effect will apply even to damage from creatures that weren’t on the battlefield
when the continuous effect beg
611.2c If a continuous effect generated by the resolution of a spell or ability modifies the
characteristics or changes the controller of any objects, the set of objects it affects is determined
when that continuous effect begins. After that point, the set won’t change. (Note that this works
differently than a continuous effect from a static ability.) A continuous effect generated by the
resolution of a spell or ability that doesn’t modify the characteristics or change the controller of
any objects modifies the rules of the game, so it can affect objects that weren’t affected when
that continuous effect began. If a single continuous effect has parts that modify the
characteristics or changes the controller of any objects and other parts that don’t, the set of
objects each part applies to is determined independently.
Example: An effect that reads “All white creatures get +1/+1 until end of turn” gives
the bonus to all permanents that are white creatures when the spell or ability resolves—
even if they change color later—and doesn’t affect those that enter the battlefield or turn
white afterward.
Example: An effect that reads “Prevent all damage creatures would deal this turn”
doesn’t modify any object’s characteristics, so it’s modifying the rules of the game. That
means the effect will apply even to damage from creatures that weren’t on the battlefield
when the continuous effect beg