What Does Protect Actually Do?

[MrThinker]

I believe it is a 15% increase in the value of def and mdef.
How much that actually mitigates, I don't know.

Less than 15% of the incoming damage more than likely. I remember the problem with WAR's old Foresight ability was that it:

1) increased physical defense, and only physical, which made it useless against magical attacks, and

2) a 20% increase in defense did not translate into a 20% reduction in damage taken, like Rampart and Shadowskin does/did