Perception +3
Passive Perception 13
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Rampage. When the hyena reduces a creature to 0 hit points with a melee attack on its turn, the hyena can take a bonus action to move up to half its speed and make a bite attack.
Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 10 (2d6 + 3) piercing damage.