Challenge Answer: UW

[Guitello]

Challenge Answer: UW 60 cards, 0 sideboard 4 {Azorius Guildgate} 9 {Island} 9 {Plains} 22 lands 4 {Aven Squire} 4 {Azorius Arrester} 4 {Sunspire Griffin} 4 {Guardians of Akrasa} 16 creatures 2 {Think Twice} 4 {Inaction Injunction} 2 {Essence Scatter} 3 {Dissipate} 3 {Pacifism} 4 {Unsummon} 4 {Azorius Charm} 22 other spells Sideboard Notes: Challenge was given to build a competitive Standard deck with no rares, this is my answer, a UW control deck