Last week sometime, I did the "A Night to Remember" questline with Sam and was sent to Morvunskar where I found the portal to Misty Grove, and found out that he was Sanguine.
Fast forward to today, Im just BSing and I talk to Varkas who gives me a Rescue Mission quest. I need to head to Morvunskar and rescue Mathias, who has been kidnapped. Ran alll the way out there and, immediately after zoning in, I hear a bunch of enemies start raging downstairs but they werent after me.
I get antsy to see what was going on so I booked it for the bottom floor and what do I find? Right outside the Misty Grove portal, Sanguine is down there just knocking the shit out of this group of 4 or 5 enemy mages. Hes just standing there beating everyone around. The mages kept running away and healing but Sanguine eventually took them all out while I stood in the back for 5 minutes or so and watched.
Once he took out the final mage, it said "objective completed: rescue Mathias". Sanguine walks away and looks at me and my flaming sword, says "Fire!" and keeps going. I ran to Mathias and took the credit for rescuing him.