Each dungeon contains the 'Arrows' item.
Each dungeon contains the 5 items belonging to the current level.
Each dungeon contains 'level + 2' items randomly chosen among the current level or below.
All the items specified as 'Trapped' hold a trap having a level equal to the current level or below.
See the section 'Miscellaneous' for a definition of the duration unit U.
(*) Effects of Magical Items are updated when a Wand or a Staff is picked up.