Voldemort has got a big army, a really big army. The wizards know they have to train the magic skills.
Mother Earth has been stirring and causing trouble for the demigods. Ever since the last big war with the Time Lord there haven't been enough campers.
As if these problems aren't big enough, the wizards find out that the Dark Lord has teamed up with the strongest and most dangerous force of all: Mother Earth and her Titans.
Now the demigods and wizards must join forces or else they'll be doomed.