Banner of Honor Quest

Having a bit of trouble on this one.....went through Brit sewer one end to the other and saw nothing. There was only one area we didnt do and it was underwater and couldnt figure out how to lower the water.
BTW...those steam levers are are pain in the butt.

• Chalice of Honor Banner: Obtained from the treasure room after defeating an Ebon Dawn Shadow Master in the heart of Brittany Sewers.

As i said ...went through it all and found nothing like this....we found some Ebon Dawn guys but no master.

Sidenote: If you leave through Brit graveyard ...will you enter in that same place or does it shoot you back to the beginning. If it starts me at the beginning i will be totally peeved off . I suck at puzzles.

 

In one room with water you can leave by swimming through the other end.
Beside this there are breakable walls AND important secret doors behind Shields, if I remember right.

 

Where do you get the quest? I’ve been all thru there but didn’t realize there was a quest.

 

Brittany Sewers (Tier 3) with Elite and Archmage skeletons