Yara-ma-yha-who

Bloodsuckers. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 14 (2d8 + 10) Piercing damage. The target becomes incapacitated and frightened. If the target is wearing full metal armor, this is done with disadvantage.

Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 9 (1d6 + 5) Bludgeoning damage. 

Swallow Whole. When nearby humanoid target hit points reach 0 that's within 10 feet, this monster can Swallow the target in 2 turns undisturbed. If damaged by piercing damage, they would release the target unconscious.

Regurgitate. After having the target for a week swallowed, they drain much of its blood before releasing them incapacitated and at 1 hit point.

Tree Hopper. Has a jump distance equal to half its Climbing speed.

Switch Targets. The Yara-ma-yha-who can switch targets of its Bloodsuckers to any target within 10 feet of it. It rolls and applies Bloodsuckers attack next turn. If it fails, it will fall to the ground.

Switch Targets. The Yara-ma-yha-who can switch and jump from a target of its Bloodsuckers to any target within 10 feet of it. It rolls and applies Bloodsuckers attack next turn if it succeeds. If it fails, it will fall to the ground.