This is a mirror-like blue-heavy midrange matchup where Mystical Dispute costs just {U} against their blue spells like Counterspell, Subtlety, and Tamiyo, making it a premium cheap counter. Stern Scolding is excellent against Orcish Bowmasters and Psychic Frog, both power/toughness 2 or less, snuffing out their key value creatures before they can trigger. Spell Snare is redundant with Mystical Dispute against many of their targets and their deck has plenty of higher-cost threats it whiffs on, so we trim it, and one Lightning Bolt comes out since Psychic Frog and Orcish Bowmasters can grow past 3 toughness while removal is less impactful against a controlling shell.