As Grimlock hit a building, something quite odd happened. Instead of the usual reaction of the building breaking, it bent around the fist as if it were liquid. The material simply avoided getting hit by entering a liquid-like state, and no matter how much force Grimlock and the other Dinobots put into their punches or other physical attacks, the buildings could not be destroyed. The most reaction would be a ripple, soon halted. Gaia wasn't about to allow his City to be torn down by a group of angry dinosaurs, robotic or no, not when his task had been to protect it from harm.
"The City of Heroes is under my protection. Any who attempt to harm the city, or harm others within it's boundaries, will be eliminated." Gaia's voice spoke out throughout the entire city, save the area Bob, Blake and Yang were in. Even in the midst of a speech, Gaia made sure not to interrupt Bob and his games, fearing to set off a rampage, as was common with the fickle God. "If you value your own lives or those of your friends, cease your actions immediately." Gaia was prepared to fight even these massive opponents if he had to.
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Bob simply laughed, as he looked at the two contestants in this Death Match. "Miss Blake! Your dear friend Yang wishes to kill you in order to save the girl that tortured your other friend, Weiss. Welcome to the City of Heroes." He chuckles, as suddenly health bars appeared above both contestants, representing their physical and mental health at any time compared to the norm. "Now, begin! If you don't start fighting in ten seconds, I'm going to start blowing things up!" Bob laughs crazily, as in the background battle music starts playing from no obvious source.