The moment all three statues are turned away into their respective corners, they're rewarded a flare of reddish light sparking with shocking brightness up from the floor at the center of the room. It comes with the raw ozone tang of lyrium as some old enchantment triggers, though any noise which might accompany the flash is swallowed by the muffled effect which blankets the whole of the temple.

The flash of light immediately subsides to a dull glow. Upon inspection, the glow is being emitted from a band of ancient runes which circle the mouth of an extraordinarily dark hole which has opened in the floor. From above, there's no telling how deep it is or what might be lurking in that ominous dark. Unpleasantly, the opening is distinctly 'reach in and touch something' in dimension.

It's probably fine. Nothing bad ever came from a gross dark hole in a cursed temple.