Also known as Wormskull.

1----+----+----+----+----+----+----+----+
                                        |
               +----+----+----+----+    +
                                   |    |
                    +--o-+----+--o-+----+-----+
                                   |           \
               +--o-+----+----+----+            v
                                                 \
                              +----+----+----+----+----+----+----+----+
                              |    |         |    |    |    |    |    |
                              +    +-x--+    +----+    +    +    +----+
                              |                   |                   |
                              +-x--+----+    +----+              +----+
                              |         |         |                   |
                              +----+    +         +-x--+----+----+    +
                              |         |         |         |    |    |
                              +-->-+    +    +----+    +    +    +    +
                              |         |         |    ^    x    |    |
                              |         |         |    x    v    |    |
                              +----+    +    +----+    +    +    |    +
                              |         |         |    |         |    |
                              +-x--+----+         +    +----+----+    +
                              |                   |                   |
                              +    +         +    +----+    +     +---+
                              |    |         |    |         |         |
                              +----+----+----+----+----+----+----+----+

1 = Thalos {10-25}

Key to Mystic Adventure ASCII Maps