A Procedural Generated Arena by generating pseudo-randomized white buildings. This is a mechanic, that could be incorporated differently in different styles of PvP and PvE arena game plays. Here, the ground and the walls in the player's vicinity, break down into tiles and start oscillating in a sine wave motion with a certain color. This can mean many things, such as color coding for different teams, visual cues for spotting the other players, removal of camping and many more.
The video below goes into detail - the concept, the execution, and the roadblocks.