[thejeff]

If two battles occur in the same turn, the unit can be blessed again, thus getting the protection again.

The case under dispute here is units that are permanently blessed by Shroud of the Battle Saint. (and prophets?)
It should be fairly easy to confirm whether a Shroud renews the Twist Fate effect in a second battle. Whether it protects against multiple overland spells is a little trickier to test.