Stiflenought: Sideboard Guide

Price of Progress does nothing to us: every land is an Island. Pyrostatic Pillar punishes cheap spells, so the cantrips go out. Annul stops Pillar, Seal of Fire and Black Vise.

Annul counters every enchantment they cast. Back to Basics locks Serra's Sanctum and Brushland. Counter Solitary Confinement: it prevents all damage to them.

Back to Basics hits most of their mana. Save a counter for Armageddon. Annul for Mox Diamond and Sylvan Library.

Annul counters Opalescence and Parallax Wave, not Replenish (a sorcery): keep Counterspell for it. Don't mill them with Vision Charm, it fills the graveyard Replenish returns.

Goblin Piledriver has protection from blue: counter it on the stack, the blasts can't touch it once it lands. Essence Flare kills an X/1 at their upkeep unless Goblin King is out.

Smother and Snuff Out both kill Dreadnought: hold Vision Charm or a counter when you cast it. Essence Flare for Nantuko Shade and Ravenous Rats, Annul for Phyrexian Arena and Cursed Scroll.

Back to Basics is the key card. Stifle can't stop Standstill: Stifle is a spell, so casting it triggers Standstill again and they draw three anyway. Daze gets worse the longer the game goes.

Stifle the Oath of Druids trigger. Annul stops Oath, Sylvan Library, Sphere of Resistance and Mox Diamond. Back to Basics hits almost all their lands.

Annul counters their Dreadnought. Powder Keg on one counter kills every Dreadnought, yours too.