"Eep!"  Mera squeaked, stiffening when Yifa 'patted' her behind.  The thrown punch failed to connect with anything resembling rock.  It wasn't there!  Mera had been right, this was an illusion after all!  "So, ah, who goes first?"  Mera stepped up next to Yifa, looking into the opening.  She did note something, though. "Oh, by the way, while the records note that the space is big enough to house a warstrider fang, there aren't any warstriders in here.  At least, none that can get out this way.  The opening's big enough for a handful of people, walking shoulder-to-shoulder, to get through, though."