Gryffwing Cavalry

Gryffwing Cavalry

Creature - Human Knight | Power/Toughness: 2 / 2 (CMC 4)
Flying
Training (Whenever this creature attacks with another creature with greater power, put a +1/+1 counter on this creature.)
Whenever Gryffwing Cavalry attacks, you may pay . If you do, target attacking creature without flying gains flying until end of turn.