When you are ready enter the fog gate.
Undead asylum locked door.
Once outside you ll emerge onto a balcony.
Keep this in mind for your return to the northern undead asylum.
It is the rusted ring and you can t get it until you leave the asylum and come back later.
You get back as soon as you reach the church where the first bell is located there is an elevator that will create a shorcut to firleink from the elevator you can jump off it and land on a roof and go right you will see a support arch to which you can jump roll to land on it climb the stairs and you.
Behind the undead soldier sword is a locked door.
Once you have finished off your first real enemy be sure to heal up using your estus flasks if you ve taken any damage.
Read the messages on the floor to learn more about special.
Other answers i don t remember if the demon drops the key or you get it from the guy that gives you the estus flask one of them should give you the key to open that door if you didn t got it then.
Dispatch the hollow guarding the door and use the undead asylum f2 east key to open the door.