Fortify [Survival]

Requires Survivalist Feat

When making temporary modifications to a campsite,
battlefield, stronghold, or other area, you can add your
proficiency bonus to checks related to construction or
improvement of barriers, fortifications, or similar works. These
works add your proficiency bonus to their armor class for the
duration, and gain a number of temporary hit points equal to
your level.
If a restraint or fortification you create has a DC to break
it (such as a blocked doorway or tied-up creature), this DC
increases by your proficiency bonus as well.

Next Rank /Survivor/