Opt is an exciting reprint that's opened up a lot of options in Modern. The combination of Opt and Snapcaster Mage giving control decks card selection at instant-speed is a game-changer, and people are just starting to explore all of the possibilities. This take is somewhat reminiscent of Blue Moon, but updated for the current metagame:

Blue-Red Control - Modern | MyLast, 5-0 Modern League

• Creatures (8)
• 2 Pia and Kiran Nalaar
• 2 Vendilion Clique
• 4 Snapcaster Mage

• Instants (17)
• 2 Electrolyze
• 2 Logic Knot
• 2 Spell Snare
• 3 Cryptic Command
• 4 Lightning Bolt
• 4 Opt

• Sorceries (4)
• 4 Serum Visions

• Enchantments (5)
• 1 Blood Moon
• 4 Spreading Seas

• Artifacts (4)
• 2 Engineered Explosives
• 2 Relic of Progenitus

• Lands (22)
• 1 Mountain
• 7 Island
• 1 Desolate Lighthouse
• 1 Misty Rainforest
• 2 Steam Vents
• 2 Sulfur Falls
• 4 Flooded Strand
• 4 Scalding Tarn

• Sideboard (15)
• 1 Abrade
• 1 Batterskull
• 2 Blood Moon
• 3 Ceremonious Rejection
• 1 Dispel
• 1 Izzet Staticaster
• 2 Kozilek's Return
• 2 Relic of Progenitus
• 2 Surgical Extraction

Buy This Deck Export text format

Vendilion Clique and Pia and Kiran Nalaar are your two means of closing games out quickly. Both cards apply pressure quickly and demand answers before your opponent ends up in range of Snapcaster Mage and Lightning Bolt.

If you're looking for a control deck that plays a high density of hard counterspells and can turn the corner quickly, this is a great deck to do that. The density of cantrips means that the cards you choose for your last couple of maindeck and sideboard slots are critically important, as is the balance of late-game hard counterspells versus Spell Snares and Lightning Bolts. There's a lot of flexibility in this style of deck, and that makes it a great choice for the current Modern format.