A new Echoes of Wisdom Trailer was launched, and these are a few things that it contained. Press 1 to (vaguely) see a boss shown. It is made of rocks, and its weak point is a purple orb not shown in the picture. Press 2 to see Zelda wielding the "Mysterious Sword". It turns her into a Link look-alike and gives her sword proficiency.
It can only be used for a limited time though.
