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(20, 'Flower'),
            chanceOf(50, 'food:1'),
            chanceOf(20, 'magic:1'),
            chanceOf(10, 'Stick')
          ],
          quest: kill('fox', 1)),
  
negative.code:         ],
          drop: [
            chanceOf(60, 'food:2'),
            chanceOf(30, 'magic:2'),
            chanceOf(10, 'equipment:2')
          ],
          quest: kill('wild dog', 3)),
        level(() => new TrainingGrounds(), numMonsters: 16, numItems: 11,
  