Fatal Push kills Fanatic of Rhonas outright (mana value 2) without needing revolt, and it even handles Slumbering Trudge, since that card's mana value on the battlefield is only 1. Still, it's dead against their true heavy hitters like Ulamog and Emrakul, so it's cut for Toxic Deluge, which sweeps their smaller creatures like Fanatic of Rhonas and Disciple of Freyalise. Consign to Memory counters their colorless spells and creatures (Emrakul, Ulamog) and disrupts Kozilek's Command outright, though it can't touch green spells like Slumbering Trudge or Green Sun's Zenith since those aren't colorless. Pithing Needle can name Green Sun's Zenith-fetched utility creatures' activated abilities or shut down a problematic land like Mosswort Bridge. Basim dies too easily to their bigger creatures in combat and doesn't pressure a deck this grindy, so it's trimmed for interaction.

Fatal Push handles most of their small threats just fine, including Basking Broodscale, since adapt counters don't change its mana value, but it still whiffs on Devourer of Destiny and Emrakul, so we trim some copies for Toxic Deluge, which sweeps their entire board of small creatures for a manageable life payment. Consign to Memory stops colorless spells like Devourer of Destiny, Emrakul, and Kozilek's Command from resolving, but it can't touch green sorceries like Ancient Stirrings or Malevolent Rumble, which are colored spells outside its reach. Vexing Bauble punishes their many 0-mana-adjacent effects less directly, but Pithing Needle can shut down a problematic Urza's Saga or a repeatable threat. Basim is a fragile attacker against a deck full of blockers and removal, so it sits while we prioritize interaction and sweepers.

Harbinger of the Seas turns all their nonbasic lands into Islands, shutting off the colored mana they need for spells like Lightning Bolt and Expressive Iteration, while also trading well in combat against their small one-power early creatures. Consign to Memory is cheap interaction against their aggressive curve and can counter a colorless spell like Mishra's Bauble or answer Cori-Steel Cutter triggers. Force of Negation lets us counter Cori-Steel Cutter or Expressive Iteration for free on their turn. Basim and Erayo are too fragile and slow against a deck this fast and full of removal, so they come out in favor of proactive disruption and a hate-bear that cripples their mana.