Windrider

Haste, First Strike
Level Up 1/0 (Whenever this creature attacks or
blocks, it randomly gains +1/+0 or +0/+1 after the
combat if it is still in play. The maximum power and toughness it can gain through this method is +1/+0)
Air breathes through the soul, touching depths of
existence that mortals see only in their dreams. The followers of Air believe that they are infused with this
power. - Balathustrius