Passage width
Small: 5 ft. wide, 5 ft. High (Medium creatures have disadvantage on attack rolls)
The smell here is unbearable. Spending more than a few minutes here results in a DC15 Constitution save; fail, character loses conciousness.
High: the water in this tunnel is waist to chest high (Difficult terrain, Swimming)
Giant rats have made a nest here. They take up a threatening posture as you approach.
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