Standard Faeries
The U/B Faeries deck in Standard has been a tournament staple since the release of the Lorwyn/Morningtide block. Of all the tribal themes to emerge from that block, Faeries has been far and away the most popular, and is a consistent Top 8 deck in major tournaments. It wins via an Aggro-control strategy, playing efficient creatures which also act as counterspells and board manipuation, coupled with the formats best spells like Cryptic Command and Thoughtseize.
Here is a sample decklist which was piloted by Antti Malin to 1st place at the 2008 World Championships. <d> Creatures 4 Mistbind Clique 2 Sower of Temptation 4 Spellstutter Sprite 2 Vendilion Clique
Instants 4 Agony Warp 3 Broken Ambitions 4 Cryptic Command 3 Remove Soul 1 Terror
Sorceries 4 Thoughtseize
Enchantments 4 Bitterblossom
Lands 1 Faerie Conclave 6 Island 4 Mutavault 4 Secluded Glen 4 Sunken Ruins 2 Swamp 4 Underground River
Sideboard: 2 Glen Elendra Archmage 1 Sower of Temptation 4 Flashfreeze 4 Infest 1 Mind Shatter 1 Ponder 2 Jace Beleren