User blog comment:KiumaruHamachi/The Unknown Girl; Any ideas?/@comment-223761-20111002015434

i think it is Mavis and she is a fairy and she has a tail and that is why she created fairy tail and she surely take the guild with her in her time capsule keeping them still until someone from the guild wake them up remember only the council search or them maybe they need the fairy tail seal to wake them up.

another idea the third magical power protected by fair tail is a time capsule power or defensive power