Keywords are: 'enter portals' Certain places on the mud, you will find portals that take you to other places. To use a portal, use the 'enter' command. Example: prompt> look Generic cliff face A generic cliff face stands before you, described in a big long description. A crack has opened in the cliff face here, leading into darkness. [Exits: none] prompt> enter crack You enter a large crack in the cliff face, and emerge on the other side.