It resolves even if that spell is countered or otherwise leaves the stack
Generally I view Bargain as more of the combo or big control card with Necro being better for agro or disruption decks
Take my Fumiko the Lowblood deck in Commander
With these, one in four of the arts contains the image of a monster stalking the character in the picture, with that monster absent the other three out of four times
Wizards of the Coast Executive Producer Max McCall says thats because they just wouldnt have had room for all of the characters and moments they wanted to include from Spider-Man if they had made a smaller product instead
Since I was working with packages of four to five cards, for example KCS plus Toxin, two Sewer-Velliance Cam plus Makeshift Munitions plus interaction, or four Galvanic Blasts, I focused on organizing the sideboard into small groups of four to five cards, and tried to avoid boarding more than that