Bone Collector

Call of the Grave. Attacks made within 60' of the bone collector score a critical hit on a roll of 19 or 20.

Death Sense. Can pinpoint by scent location of Undead creatures and creatures that have been dead no longer than 1 week within 60' of it and can sense the general direction of such creatures within 1 mile of it.

Magic Resistance. Advantage: spell/magic effect saves.

Undead Nature. Doesn't require air food drink or sleep.

Talons. Melee Weapon Attack: +4 to hit, 5 ft., one target, 9 (2d6+2) slashing damage. If target is a creature: DC 11 Con save or contract a disease. Until disease is cured target can't regain hp except by magical means and target's hp max decreases by 3 (1d6) every 24 hrs. If target's hp max drops to 0 as a result of this disease target dies.

Bad Omen (1/Day). Places a bad omen on a creature it can see within 20' of it. Target: DC 10 Wis save or be cursed for 1 min. While cursed target has disadvantage on attack rolls vs. bone collector. Target can re-save at end of each of its turns success ends effect on itself.