Tengen Uzui, Sound Hashira

Haste, Menace

Sound Breathing: You draw a card when another card Flashes into the battlefield.

{3}{w}, Roar: Give target creature you control Haste. If that creature attacks, draw a card.
{4}{p/w}, Boom: Creatures you control that can enter this turn have Flash.
{2}{w}{b}{p/w}{p/b}, Super Sonic Slashing: Deal "X" damage to all creatures where "X" is the amount of creatures with Haste or Flash on the battlefield.