Keen Hearing and Smell. The weasel has advantage on Perception checks that rely on hearing or smell.
Maneuvers. The weasel uses maneuvers (maneuver save DC 12). It has 2 stamina dice which are d8s, a dice limit of 1, regains all expended stamina dice when it finishes a long rest and regains half its total stamina dice when it finishes a short rest, and knows the following maneuvers:
Bite. Melee Weapon Attack: +5 to hit, reach 1.5 m., one creature. Hit: 1 piercing damage.