Red Robes

The Red Robes are a group of wizards, warlocks, and other magics users that created the Grand Relics. The members are known by the red robes they sport.

Appearances
Taako retrieves the Umbra Staff off a skeleton wearing a red robe, but that might just be a sartorial choice.

The first known appearance of a Red Robe is in Ep. 27. Magnus immediately tries to punch it, twice, and chop it with RailSplitter, but nothing connects. Inside the robe is a black void with a tiny speck of white light that pulses as it speaks.

'''"ARE YOU AFRAID?" '''the Red Robe whisper-shouts. The boys hedge that everyone is a little afraid sometimes. "YOU DO NOT KNOW HOW TO BE AFRAID," they state.

The Red Robe projects a holographic series of familiar faces and narrates through them:

"GUNDREN ROCKSEEKER. MAGIC BRIAN. JENKINS. SLOANE. CAPTAIN BAIN. THIS IS THE TRUE NATURE OF MAN. THE WANT, THE HUNGER. IT CONSUMES EVERYTHING IT TOUCHES. IT CAN'T BE STOPPED OR CHARMED. IT IS THE END OF EVERYTHING. THIS IS YOUR FIRST LESSON."

And then it disappears in a spout of flame.

More information -- and spoilers
Their location, members, and motives are unknown as of now, save for one — Magnus Burnsides, whose apparent ties to the organization were revealed in the conclusion to ''The Eleventh Hour. ''However, at least one unknown Red Robe has been keeping an eye on the PCs, with the apparent goal of "protecting them."