anchor.diff:          drop: [
             chanceOf(20, 'Flower'),
             chanceOf(50, 'food:1'),
  -          chanceOf(20, 'magic:1'),
  +          chanceOf(10, 'magic:1'),
  +          chanceOf(10, 'equipment:1'),
             chanceOf(10, 'Stick')
           ],
           quest: kill('fox', 1)),
  
positive.code:           'frog'
          ],
          drop: [
            chanceOf(25, 'Flower'),
            chanceOf(50, 'food:1'),
            chanceOf(10, 'magic:1'),
            chanceOf(15, 'Stick')
          ],
          quest: kill('fuzzy bunny', 1)),
        level(() => new Forest(meadowInset: 6), numMonsters: 8, numItems: 10,
  
negative.code:         ],
          drop: [
            chanceOf(55, 'food:3'),
            chanceOf(30, 'magic:2'),
            chanceOf(15, 'equipment:3')
          ],
          quest: kill('giant spider')),
        level(() => new TrainingGrounds(), numMonsters: 20, numItems: 12,
  