According to Plan
As the various armies realised that their preparations were for naught and the Legend Sword Shards had been taken in the end, they all picked up the pace.
Being led by Christopher's subordinates, they all did their best to reach the Voidwalkers main base and stop them before they succeeded in whatever they were trying to do.
Christopher however, knew that it was pointless. By the time they arrived, the Sword would have been assembled and the Void's avatar would have been summoned.
In other words,.they were all going there to die.
'But not if I have anything to say about it.'
As he had that thought, vast amounts of water suddenly started To get transported in his dimension. Vast being hundreds of thousands of litres of water that poured in endlessly.