Looking at the guys that were willing to fight as well, Oliver smirked wondering just how effective his poison will be. If they couldn't hurt each other, what was the point in testing their greatest features? He moved before Vol hit him but didn't say anything. He gave him a glare as if he was to say he'd "accidentally" poison him first. 

He heard Roxy [color=gray]I've fought for fun and to kill. Val tudo and Brazilian jiu-jitsu.[/color] He told them. He walked with them watching both birds fly while waiting on this sparring to start. If the birds were to spar with each other then he could go with Roxy..