From publisher blurb:
A Brand New Guild Option For 5th Edition
“All for the cause.
All for the realm.
All against the darkness.”
— Order of the Sentinels creed
The Order of the Sentinels is an ancient and secret society dedicated to protecting mortals from the supernaturally evil threats that work to escape the confines of their planes and wreak havoc on the Prime Material. These brave guardians risk their own lives and souls to ensure that nothing sinister crosses the Veil between the planes and that those creatures that make it through are tracked down and destroyed.
This supplement includes:
Information on The Order of the Sentinels, an ancient secret society.
A new guild feature for PCs
The Sentinel's Light, a new magic item carried by all members of the guild.