itstime
UR Aggro
Mainboard(56 cards)
Creature(8)

Emberheart Challenger×4
{1}{R}Creature — Mouse Warrior
Slickshot Show-Off×4
{1}{R}Creature — Bird WizardInstant(16)

Full Bore×4
{R}Instant
Might of the Meek×4
{R}Instant
Secret Identity×4
{U}Instant
Turn Inside Out×4
{R}InstantSorcery(4)

Boomerang Basics×4
{U}Sorcery — LessonEnchantment(8)

Leyline of Resonance×4
{2}{R}{R}Enchantment
Stormchaser's Talent×4
{U}Enchantment — ClassLand(20)

Island×2
Basic Land — Island
Multiversal Passage×4
Land
Riverpyre Verge×2
Land
Spirebluff Canal×4
Land
Starting Town×4
Land — Town
Steam Vents×4
Land — Island MountainSideboard(15 cards)
Planeswalker(2)

Ral, Crackling Wit×2
{2}{U}{R}Legendary Planeswalker — RalInstant(12)

Annul×2
{U}Instant
Burst Lightning×4
{R}Instant
Into the Flood Maw×2
{U}Instant
Spell Pierce×2
{U}Instant
Spider-Sense×2
{1}{U}InstantSorcery(1)

Pyroclasm×1
{1}{R}Sorcery