Arm- and legbands of the eternal fight (dormant)

The eternal fight, two gods of combat bound to forever fight eachother so the other doesn't bring down their will on the world. 

while wearing these ancient bands you channel the power of the evergrowing fight and combat only make you stronger the longer it goes on.  

On your first turn of combat you gain control of the battlefield.
When you hit a creature with an attack you may once a turn force a strength saving throw (DC 16) if they fail you move them 15ft. 

On your second turn of combat your body speeds up in an attempt to immediatly stomp out the opposition.  
Your second turn of combat you have one extra action but only this turn.