A gateway, or more likely several, would be opened in various places in Zanibra directly from Earth, in order to allow humanity to bring over supplies, machinery, and personnel. The unicorns of the Arcanum were getting worried about the number of gateways being opened and the effects that would have on the Veil, so the Zanibra gates would only be kept open for short bursts of time, meaning that the humans would have to hurry in order to get large quantities of supplies through. 