E4M9: Mausoleum (Heretic)

E4M9: Mausoleum is the secret map in The Ossuary episode of Heretic Shadow of the Serpent Riders, and can be accessed from E4M4.

Walkthrough
(To be written)

Secrets
From the above secret. The middle one has some health From the above secret. The north one has ammo and an urn. You will get hurt getting these. If you spend as much time as possible in the shadowed area of the lake, where you can't get hurt, you can minimize the amount of damage you take.
 * 1) The lava lake in the west part of the map has several paths leading east.  Each one leads to a secret door.  The southmost one contains a shadowsphere
 * 1) In the structure with the long stairway with landings, the southeast landing has a blue banner.  Behind it is a hidden door to a room with some health, ammo, and Wings of Wrath.
 * 2) After entering the exit room, and revealing the switches, go back to the starting room.  Go east to the first junction, then south. Enter the door on your right, and go to the northwest corner of the room and hit the switch. This will reveal another Iron Lich, and an enchanted shield.