Bite

Melee Weapon Attack: +5 to hit, reach 5 ft., one creature. Hit: 6 (1d6 + 3) piercing damage, and the chupacabra attaches to the target. While attached, the chupacabra doesn't attack. Instead, at the start of each of the chupacabra's turns, the target loses 6 (1d6 + 3) hp due to blood loss. The chupacabra can detach itself by spending 5 feet of its movement. It does so after the target is reduced to 0 hp. A creature, including the target, can use its action to detach the chupacabra.

Fearful Gaze

The chupacabra fixes its gaze on one creature it can see within 10 feet of it. The target must succeed on a DC 11 Wisdom saving throw or be paralyzed for 1 minute. A paralyzed creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a creature's saving throw is successful or the effect ends for it, the creature is immune to the chupacabra's Fearful Gaze for the next 24 hours.