Supporting Pillars are important parts of scenery in the Theatre of Blood Raid.
They are found when fighting the first phase of Verzik Vitur.
These pillars have a certain amount of hitpoints, and when these hitpoints reach zero, they collapse. When this happens, all players standing directly adjacent to the pillars will get damaged and stunned.
When Verzik's phase one is ended and she transitions to phase two, all pillars in the room collapse, and players standing adjacent to a pillar will be damaged and stunned.
When fighting Verzik, players stand behind these pillars to prevent her from attacking them.