Expect Pyroblast and Red Elemental Blast out of their sideboard after boarding, since most of our deck is blue, so don't lean on any one blue spell. Relic of Progenitus comes in to exile Sneaky Snackers before they can return from the graveyard on a third draw, denying free blockers/attackers. Arms of Hadar sweeps their small creatures (Voldaren Epicure, Sneaky Snacker, Guttersnipe) for a huge tempo swing, but Kessig Flamebreather is a 1/3 and survives it, so plan another answer for it. The extra Okiba-Gang Shinobi adds a clock that can make them discard. Dispel is weak because it only answers instants, and trading a card for a cheap burn spell doesn't keep up with their raw damage output. Agony Warp is lower impact here since cheaper removal usually suffices.