Dimension of Disaster: Defender of Varrock/Quick guide

Getting Upstairs - Zombie Outfit

 * 1) Speak to Reldo in the Castle Library ( - Accept - - 5 - )
 * 2) Search the most Northern Bookcase along the Western Wall for "Heart Magic Notes"
 * 3) Talk to Arrav (slightly East) ( - 1)
 * 4) Talk to Reldo  (Free Vials can be obtained from the kitchen east of Arrav)
 * 5) If not wearing zombie override Equip full Zombie outfit (mask, shirt, trousers, gloves, boots) or Zombie override.
 * 6) Head east, go upstairs and kill an armoured zombie and collect Red Mist If you have saved red mist from a previous run, skip this step.

Upstairs - Repairing Tin Soldier
(Can be skipped on replays if you have the code just pick up decoder strips (if you didn't save those and can't remember the combination) and skip all way to unlock treasure room safe - the code will be in chat box.)
 * 1) Enter Red Barrier directly west of the armoured zombie room
 * 2) Inspect Tin Soldier in the South Western room
 * 3) Exit Castle
 * 4) Talk to the Trial Announcer at the East Varrock Bank to get tin soldier head (Space - 3 - 1)
 * 5) Enter the Red Barrier west of the armoured zombie room and into the far south western room
 * 6) "Inspect" the soldier 3 times (click 1 each time) to repair it (need 3 tins ores, four fire runes, and a nature rune)

Upstairs - Getting the code

 * 1) Return to far Eastern room
 * 2) Search crate of decoder strips in the armoured zombie room
 * 3) Kill another armoured zombie if you need to refill empty vial with red mist
 * 4) Enter the Red Barrier to the far North Western room
 * 5) Scry Scrying Pool in the north eastern corner (#7 - control the tin soldier)
 * As the Tin soldier
 * 1) Control the tin soldier to Enter the room north
 * 2) Search Zemouregal's lab desk for the code

Upstairs - unlock treasure room safe

 * 1) Unlock Treasure Room Safe First time: with the code + decoder strips Replay: using the same code as last time
 * 2) Smash Black Prism

Finishing up

 * 1) Talk to Arrav
 * 2) Quest complete (Continue)
 * 3) Pick up watering can (for the next sub-quest - not needed for replays if you saved purple mist)

Next sub-quest

 * Dimension of Disaster: Curse of Arrav/Quick guide