Bogles plays no red cards and no artifacts in its main deck, so Blue Elemental Blast, Hydroblast, and Steel Sabotage have no targets and stay in the sideboard. Gut Shot also stays out, because their creatures are hexproof and it can't target them. Annul is the card to bring in. Every threat they build around is an Aura spell: Ethereal Armor, Rancor, Armadillo Cloak, Ancestral Mask, Utopia Sprawl, and Abundant Growth are all enchantments, so Annul counters them cleanly for one mana. Dispel only counters instant spells, and their only maindeck instant is a single Ram Through, so it can't stop their auras and comes out for the Annuls. Use Counterspell, Annul, and Spell Pierce to stop auras from resolving. Spell Pierce works because their auras are noncreature spells and they often tap low. Once an aura resolves on a hexproof Slippery Bogle or Gladecover Scout, you can't target the creature, so Sleep of the Dead can't touch it. Deem Inferior can still target the aura itself, since it hits any nonland permanent. Race with Delver of Secrets and Tolarian Terror while holding up permission every turn.