Keen Senses. The defender has advantage on Wisdom (Perception) checks.

Telepathic Bond. While the defender is on the same plane of existence as its master, it can magically convey what it senses to its master, and the two can communicate telepathically.

Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit:6 (1d6 + 3) piercing damage. If the target is a creature, it must succeed on a DC 13 Strength saving throw or take an extra 3 (1d6) piercing damage and be grappled (escape DC 13). The defender can have only one creature grappled in this way at a time.