prologue: Gallifrey

everything ends
the Cybermen have arrived, an invasion fleet the size of which could engulf everything, the overworld has no organised army, the nether has not the technology, the only hope is the end, and the Cybermen will not allow them to stand.
Ceris and her allies must unify the end or an unstoppable multi-dimensional empire will arise, and the Master will have his army, and nothing can stop them, well nothing but a doctor and his blue box or should that be doctors