This mirror-ish matchup is a race to fuel Tolarian Terror and Cryptic Serpent while disrupting the opponent's mill-cantrip engine. Nihil Spellbomb lets us exile their graveyard to strip discounts from Tolarian Terror and Cryptic Serpent, undercutting their whole plan, so bring in 2 copies over the clunkier Abandon Attachments. Keep the core Counterspell and Snuff Out suite intact since we need to answer their Serpents and Terrors while protecting our own.