Well, nothing blocks divinations. However thanks Spell Engine and other wards/enchants in arena it's same as looking to find few colored dots behind a sunflare from your eyes so Arcane Sight is less useful divination in that regard (and would make obvious what your doing if you go with tunnel vision goggles adjacent to other casters :P).<br/><br/>Also it's secret what tournament entails but all know it will be 'multiple event' one (so multiple fights, trials maybe, tests etc).