Hirudine Stalker

Amphibious. Can breathe air and water.

Blood Scent. Advantage on Wis (Perception) and Wis (Survival) checks to find or track a creature that doesn't have all its hp.

Multiattack. Two Bite or Spit Tooth attacks.

Bite. Melee Weapon Attack: +5 to hit, 5 ft., one target, 8 (2d4+3) piercing damage + 3 (1d6) necrotic and the hirudine stalker regains hp equal to the necrotic dealt.

Spit Tooth. Ranged Weapon Attack: +5 to hit 30/120' one target 8 (2d4+3) piercing damage and target must make DC 13 Con save or suffer one of the following (stalker's choice):Anesthetic On a failed save the target is unaware of any damage it takes from the hirudine stalker's Spit Tooth attack for 1 hr but it is still aware of other sources of damage.Debilitating On a failed save the target is incapacitated until the end of its next turn. If the target fails the save by 5 or more it also suffers one level of exhaustion. A creature can't suffer more than three levels of exhaustion from this attack.Magebane On a failed save target has disadvantage on Con saves to maintain its concentration for 1 hr. If target fails save by 5+ it also loses its lowest-level available spell slot.

Hidden Predator. Takes the Hide action.