U/R Twin
A Modern deck, by Jack Kiefer
10th place at a tournament in Denver, Colorado, United States on 2015-12-06

Maindeck:

Creatures
4 Deceiver Exarch
2 Pestermite
4 Snapcaster Mage

Enchantments
4 Splinter Twin (Banned in Modern)

Instants
2 Cryptic Command
3 Dispel
2 Electrolyze
4 Lightning Bolt
4 Remand
2 Spell Snare

Legendary Creatures
1 Vendilion Clique

Sorceries
1 Roast
4 Serum Visions

Basic Lands
4 Island
1 Mountain

Lands
2 Desolate Lighthouse
2 Flooded Strand
1 Ghost Quarter
2 Polluted Delta
4 Scalding Tarn
3 Steam Vents
4 Sulfur Falls

Sideboard:
1 Grim Lavamancer
2 Blood Moon
2 Annul
2 Negate
1 Rending Volley
1 Teferi, Mage of Zhalfir
2 Keranos, God of Storms
1 Jace, Architect of Thought
2 Anger of the Gods
1 Roast