anchor.diff:          ],
           drop: [
             chanceOf(55, 'food:3'),
  -          chanceOf(35, 'magic:2'),
  -          chanceOf(10, 'equipment:2')
  +          chanceOf(30, 'magic:2'),
  +          chanceOf(15, 'equipment:3')
           ],
           quest: kill('giant spider')),
         level(() => new TrainingGrounds(), numMonsters: 20, numItems: 12,
  
positive.code:         ],
          drop: [
            chanceOf(60, 'food:2'),
            chanceOf(35, 'magic:2'),
            chanceOf(5, 'equipment:1')
          ],
          quest: kill('wild dog', 3)),
        level(() => new TrainingGrounds(), numMonsters: 16, numItems: 11,
  
negative.code:         ],
          drop: [
            chanceOf(55, 'food:4'),
            chanceOf(30, 'magic:3'),
            chanceOf(15, 'equipment:3')
          ],
          quest: kill('giant cave worm'))
      ]);
  