Blood Dragon

Sunlight Sensitivity. While in sunlight, the  blood dragon has disadvantage on attack rolls, as well as on Wisdom (Perception) checks that rely on sight.

Shadow Stealth. While in dim light or darkness, the  blood dragon can take the Hide action as a bonus action.

Multiattack. The blood dragon makes three attacks: one with its proboscis and two with its claws. Or one attack with its proboscis and one with its tail

Blood Drain. Melee Weapon Attack: +8 to hit, reach 5 ft., one creature. Hit: 15 (3d10 + 5) piercing damage, and the blood dragon attempts to grapple the target. The target, must make a DC 17 Strength saving throw in order to escape the grapple. While grappling, the blood dragon doesn't attack with its beak. Instead, at the start of each of the blood dragon's turns, the target loses 15 (3d10 + 5) hit points due to blood loss.

The blood dragon can detach itself by spending 5 feet of its movement. It does so after it drains 50 hit points of blood from the target or the target dies. A creature, including the target, can use its action to attempt a DC 17 Strength saving throw in order to escape the grapple.

Claw. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 12 (2d6 + 5) slashing damage.

Sting. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 10 (1d10 + 5) piercing damage. plus 5 (1d10) poison damage. The target, must make a DC 17 Constitution saving throw or become poisoned.