The manga just took a really heavy turn and if you've followed it so far, the gang is on a floating-block type island that is actually a creature and are trapped in something one cannot escape from.
Lucy is the only one not trapped in this field and as the latest chapter reveals, has to destroy one of her golden keys to summon the spirit king for his powers.
I didn't really expect that, I expected more that she would summon her whole gang, but instead she lost a key and the king decends from the heavens with a massive
sword, slicing up the block-island and generally bringing everything down.
Quite the chapter! Gotta love Shiro-Hige (white mustache man, the spirit king)
Page 20, Spirit King decends: