delves detail (Delves)

Delves are instanced, procedural 3-room dungeons containing scaled monsters,
            a powerful Boss, guaranteed artifact loot, and a return portal.

            Usage:
              delve              - View available delves and level requirements
              delve sewers       - (Level 1+) Old Oakhaven Sewers (Entrance at City Cistern)
              delve crypts       - (Level 3+) Forgotten Catacombs (Entrance at The Whispering Crypts)
              delve mine         - (Level 5+) Abandoned Iron Mine (Entrance at Stone Tollhouse)

            Entering & Exiting:
              Once summoned, an entrance portal opens at the delve's city/wilds origin point.
              Defeating the boss unlocks the 'surface portal' returning directly to the city.
              Unused or abandoned delves automatically collapse and clean up after 10 minutes.