It Comes From Beneath

Background
When The Mad dwarf set off the explosives he used all he had and in doing so he collapsing and faulty and old foundation in the basement. Well you need to go into these basements and do what you do best! (Kill) But there are two stages in witch you need to proceed. Stage one kill enemies till rubble Stage two find a choke point were you block the the darkspawn from entering the city. Family Crypt.

Walkthrough
(First Stage) Talk to the guard at the front of the house and she will tell you whats going on, then she will take you inside. When inside she will talk some more then you will (probably) request that they remove the rubble...(CUT SCENE)...Now you will go down the stairs and you will approach a room with about five or six dead darkspawn with loot on them, there will be a dog laying on the floor, there will be a note attached to the dog saying a women is trapped and needs help. As you move forward you will enter a room with five darkspawn, kill them and loot them. (their will be two creates in the room,to the right is a storage room with three crates and to the left is a room were a secret chest is, once you go in you will suddenly be attacked by some shriek take the loot then go and select the statue then the torch and that will open a secret passage and the chest with some good stuff) As you move on you will enter a room with infected prisoners, after killing them there is one crate and behind the counter to the left were you entered is a guard body, there are still prisoners in the cage to your left that are not infected and you can ether let them go, tell them its to dangerous and should stay, kill them or take there clothes witch Oghen will approve +5. (There is a room to the left witch is a family crypt, grab all the stuff and the go down the stairs upon doing this you will be attacked by ten undead, after killing them use the key that you got from the loot in the crypt on the bottom right side key hole of the door. (Three more keys required) As you move to the next room there will be a cut scene, after that you will get to kill the evil woman and three other enemies, there will be one stash of papers. Move in front of the rubble and the cut scene...

(Second Stage) After removing the rubble they find a a tunnel that is connected to the Deep Roads. Go straight and head to your right to a room were you find a dead darkspawn with a statue on him, go to the alter and take the offering and kill the two golem. Now head the other way and there will be four rooms were darkspawn are kill them and in the one to the right there will be Lyrium Sand and the one to the left a hidden chest with a lock on it, in it there will be a key to the crypt. Continue on and there will be a gate were darkspawn are, kill them and move down the hall once done you will see four statues do not walk in the middle of the platform go around(If you don't you will be frozen, once you pass the halfway mark of the platform four undead will attack you. The next room is quite difficult so be careful there is an ancient shriek, go about killing him and around half way there are five undead that will come at you dispose of them quickly or they will eat away at your companions, once done a quest will appear that you will basically have to face him again. In the room will be four vases with some good loot, when your done in the room select the center piece and it will open the door. As you go down the hall you and move along you will meet an even greater hall were the final battle is. List of enemies five darkspawn and one tough ogre, after killing them all, but the once dead ogre comes back as a spirit this is because of the ancient shriek kill him and a cut scene will commence showing the dwarf closing the dwarvin gates. make sure you do not leave with the guard just yet, retrieve your spoils. Note During the second part there are two keys for the crypt on darkspawn so check them all.

Family Crypt

Go back to the Family Crypt and use the keys and open the door. (Warning may want to wait till you are a higher rank) Enemy list, four crypt family members and the hardest enemy in the game, a lord so be careful. After defeating them there will be five bodies to loot and three crypts.

Result
You do not get any thing for doing this only the stuff you fought for.