From Rimalen
Taryn traces the outline of a sigil into the air before you and says, "This is the Sigil of Defense, memorize it well. By focusing on this sigil, you can call forth a shimmering aura of protection that will make you harder to hit in battle. The cost to you for this boon is 5 points of both mana and stamina. Go now, and make good use of what I have taught you."
Right now it only adds +1 DS being attacked by another PC. We'll have to see if it gets better/is different for huntin TEH GRIMSWARMZ!
-Sea Wizard