Ever since Splinter Twin made itself out to be the top tier strategy in Modern, players have been looking for new ways to hybridize combo and control decks. Sometimes, that takes the form of Scapeshift decks. Other times, it's slotting Through the Breach or Nahiri, the Harbinger into Jeskai Control. However, with the rise of Spreading Seas as critical mana disruption in the format, perhaps it's time for our combo-control deck to be built with Spreading Seas in mind:

Jeskai Saheeli - Modern | JanH, 5-0 Modern League

• Creatures (11)
• 1 Pia and Kiran Nalaar
• 2 Wall of Omens
• 4 Felidar Guardian
• 4 Snapcaster Mage

• Planeswalkers (5)
• 1 Jace, Architect of Thought
• 4 Saheeli Rai

• Instants (14)
• 2 Lightning Helix
• 4 Lightning Bolt
• 4 Path to Exile
• 4 Remand

• Sorceries (4)
• 4 Serum Visions

• Enchantments (4)
• 4 Spreading Seas

• Lands (22)
• 1 Mountain
• 1 Plains
• 2 Island
• 1 Sacred Foundry
• 1 Sulfur Falls
• 2 Celestial Colonnade
• 2 Hallowed Fountain
• 2 Spirebluff Canal
• 2 Steam Vents
• 4 Flooded Strand
• 4 Scalding Tarn

• Sideboard (15)
• 1 Abrade
• 1 Celestial Purge
• 2 Ceremonious Rejection
• 1 Disdainful Stroke
• 2 Dispel
• 1 Engineered Explosives
• 1 Izzet Staticaster
• 1 Pia and Kiran Nalaar
• 1 Relic of Progenitus
• 2 Settle the Wreckage
• 1 Stony Silence
• 1 Wear // Tear

Buy This Deck Export text format

The key here is that this deck is built to take advantage of the combo between Felidar Guardian and Saheeli Rai. Rather than playing Restoration Angels to go with your Wall of Omens, you can use Felidar Guardian to reset Spreading Seas to hit more pertinent lands, untap a land to keep a key piece up disruption up, or flicker a Snapcaster Mage to rebuy a Lightning Bolt.

The utility that this provides is that you have the ability to win the game out of nowhere with Saheeli Rai. Additionally, you have the option of playing a card like Sun Titan at the top of your curve, which can also combo with multiple copies of Saheeli Rai to let you attack with infinite Sun Titans.

If you're looking for a more proactive version of control for your metagame, this could be a great variant to try out. Saheeli Rai isn't a great card on its own, but it gives you the ability to actually end games, rather than sitting back on Search for Azcanta and Cryptic Commands. Additionally, the ability to just win the game on turn four against faster combo decks in the format shouldn't be underestimated.