Astral Wolf

Keen Hearing and Smell. The wolf has advantage on Wisdom (Perception) checks that rely on hearing or smell.

Bite. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 14 (3d6 + 6) piercing damage. If the target is a creature, it must succeed on a DC 13 Strength saving throw or be knocked prone.

Terrifying Howl. The Astral Wolf howls. Any beast or humanoid within 300 feet of the mastiff and able to hear its howl must succeed on a DC 11 Wisdom saving throw or be frightened for 1 minute. A frightened target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a target’s saving throw is successful or the effect ends for it, the target is immune to any Astral Wolf's Terrifying Howl for the next 24 hours.