On this page of the Steelrising guide you will learn how to defeat the mini-boss Unstable Falcon. It is a dangerous opponent, as it is fast and a lack of attention even for a brief moment can cost you a lot.
As with its regular versions, the Unstable Falcon can also attack quickly. One of its attacks is a spin that deals damage around it. In addition, the mini-boss can leap into the air and hit the ground.
Due to the attack speed and considerable mobility, it is best to run up to the mini-boss, deal 1-2 attacks and jump away. If possible, attack it from behind. You should also try to stun it. Freezing, for example, will work well here.