E1M6: Last Aquaduct (Heretic Treasure Chest)

E1M6: Last Aquaduct [sic] is the sixth map of episode 1 of Heretic Treasure Chest. It was designed by Ler and uses the music track "Onyx" from Heretic, created by Kevin Schilder.

Essentials
Take the Hellstaff and Greater Runes in front of you then open the door to find a crossroads guarded by fire gargoyles, nitrogolems and undead warriors. Collect the Tome of Power (which does not appear on bringest them oneth skill level) then take the south path to find an Ethereal Crossbow before entering a room with a Bag of Holding (only on easy and medium skill levels). Go down the steps to a blue chamber containing several disciples of D'Sparil and other monsters, then press the switch behind the Silver Shield to open the south wall and reveal more monsters. Head due south until you enter a tunnel with a Tome of Power, then go round the corner to find a cavern with weredragons and fire gargoyles guarding the green key.

Backtrack to the crossroads, watching out for numerous monsters that have teleported into the large blue chamber on the way, then take the east path to a green door and open it. Follow the green passage past some nitrogolems to a teleporter, step into it and follow the next passage to a chamber with several monsters guarding a yellow key. When you try to take the key you will be teleported to a stream with a Silver Shield and other items; follow the stream to a green cavern with ophidians and sabreclaws, then climb up the steps to reach another yellow key in front of a teleporter. Take this key then step on the teleporter to return to the crossroads.

Take the west path from the crossroads to find some Lesser Runes and Mace Spheres in front of a yellow key door. Open the door and kill all the enemies waiting behind it, then head west to see an exit door behind two wooden blocks. There are two teleporters to the north and south that you need to use to lower these blocks.
 * Enter the red (north) teleporter to reach a chamber with three iron liches; use the Tome of Power in front of you to help destroy the liches, then press the switch in the north wall to open an alcove behind you with a sabreclaw guarding another teleporter that will return you to the exit area.
 * Enter the blue (south) teleporter then approach the wall in front of you to lower it; there will be two liches to your left and right. Destroy both enemies then press the switch in the north wall, which will open an alcove behind you containing a sabreclaw guarding another teleporter that will return you to the exit area.

After pressing both switches, go through the exit door to find a Mystic Urn and a teleporter that will send you to E1M7: Necrosis.

Secret exit
Refer to secret #2 below for information on reaching the secret exit to E1M9: Omgekeerd.

Other points of interest
A Firemace can spawn in the large blue room south of the crossroads, next to a Shadowsphere.

Secrets

 * 1) In the eastern-most part of the map, go up the rocks and look at the column at the east side. It forms an arrow pointing to the wall. Open the wall it points to to find a Mystic Urn. (sector 147)
 * 2) Once you get the yellow key, return to the area where you tried to get a yellow key earlier (where you teleported to the east side of the map), then head south-east from there to find the secret exit along with some crystal vials and a Mystic Urn. (sector 196)

Current records
The records for the map at the Doom Speed Demo Archive are:

The (absence of) data was last verified in its entirety on April 3, 2022.

Player spawns
This level contains four spawn points:
 * 1) facing north. (thing 86)
 * 2) facing north. (thing 87)
 * 3) facing north-west. (thing 90)
 * 4) facing south. (thing 91)

Things
This level contains the following numbers of things per skill level: