Swiftwing Assailant 

Creature — Bird Warrior
Flying Start your engines! (If you have no speed, it starts at 1. It increases once on each of your turns when an opponent loses life. Max speed is 4.) Max speed — This creature gets +0/+1 and has vigilance.
Legality
standardLEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL