Keen Senses. The dragon has advantage on Wisdom (Perception) checks that rely on sight, hearing, or smell.

Magic Resistance. The dragon has advantage on saving throws against spells and other magical effects.

Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 4 (2d4 + 3) piercing damage plus (1d4) necrotic damage for 5 turns.

Sting. Melee Weapon Attack: +4 to hit, reach 10 ft., one creature. Hit: 4 (1d8 + 4) piercing damage, and the target must succeed on a DC 11 Constitution saving throw or become poisoned for 1 hour. If the saving throw fails by 5 or more, the target falls unconscious for the same duration, or until it takes damage or another creature uses an action to shake it awake.