Roleplay:Island of Enigma

It is a normal day in Station Square. People are busy doing their usual day-to-day routines. It is a calm and peaceful day, or at least it was, until, out of nowhere, the city was bombarded by a huge tidal wave. When it cleared, the city was completely flooded, however, that was not the full extent. Out of nowhere, a huge island rose out of the ocean near the city, as if daring any brave explorers to come to it. two days after it appeared, there were reports of strange, glowing, lizard like creatures all over the city. What is this mysterious island? What secrets does it hold? What effect will it have on the world? And why did it suddenly appear?