Thoughtseize strips away Swords to Plowshares or Static Prison before we commit our one big threat, so we can resolve it into an open table. Force of Vigor replaces the dead slots: it destroys Static Prison, which returns whatever it exiled, and it also hits Goblin Bombardment. On their turn it can be cast for free by exiling a green card from hand, so we can answer a Static Prison without losing tempo. We want to prioritize resolving Natural Order into a big body and protecting it, since their removal suite (Swords to Plowshares) can one-for-one answer our single-threat plan. Once Upon a Time digs less effectively against their proactive clock, and Boseiju, Who Endures is exposed to their Wastelands, so both come out. Core mana creatures and Gaea's Cradle remain untouched to keep pace with their aggressive curve.

Thoughtseize lets us proactively strip their Force of Will or Daze before we jam Natural Order or Green Sun's Zenith into a wide-open hand. Choke is strong here since their mana is heavily blue, with Islands and Underground Sea (an Island type) all staying tapped once used. That cramps Brainstorm, Ponder, and their other blue spells. It does not shut off Force of Will or Daze, which can be cast for free by exiling a blue card or returning an Island, so we still need Thoughtseize and good sequencing to get past those. Once Upon a Time and both Boseiju come out since this matchup is about resolving threats through countermagic rather than grinding incremental card advantage. Keep the core ramp and threat package intact to force through Craterhoof Behemoth or Atraxa while Choke keeps them off mana.

Thoughtseize is critical to strip Show and Tell, Aluren, or Force of Will out of their hand before they can combo off into Atraxa, Grand Unifier or Omniscience. Force of Vigor can exile a green card to destroy Aluren itself for free on their turn, completely shutting down their combo engine, and can also hit Omniscience. Once Upon a Time and the extra Boseiju come out since card selection is less important than proactive disruption against a combo deck that can win out of nowhere. We keep our full mana base and threat density to pressure them quickly in case our disruption doesn't fully stop the combo.