Saviour is a mobile anti-nuke missile system. It has a shorter range than anti-nuke structures, but you may move it around wherever you want. In late-game, it is very important to combine at least one with your army to prevent them getting nuked out of your territory.

Compared to the Umbrella, the Saviour lacks all-terrain capability, but has 350 more range (1750 vs. 1400).

It stockpiles 1 anti-nuke every 90 seconds, for 150 metal/6500 energy per shot.

You may wish to manually decrease its max missile stockpile to not waste resources.