10
78 (12d8 + 24)
walk 30 ft.
necrotic
poison
charmed, exhaustion, poisoned
darkvision 60 ft.
understands the languages it knew in life but can't speak
4
If damage reduces the plague spreader to 0 hit points, it must make a Constitution saving throw with a DC of 5 + the damage taken, unless the damage is radiant or from a critical hit. On a success, the plague spreader drops to 1 hit point instead.
The plague spreader doesn't require air, food, drink, or sleep.
Any creature that starts its turn within 10 feet of the plague spreader must make a DC 12 Constitution saving throw. On a failed save, the creature is poisoned and can't regain hit points until the end of its next turn. On a successful save, the creature is immune to this plague spreader's Viral Aura for 24 hours.
The plague spreader makes two Slam attacks.
Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit:6 (1d6 + 3) bludgeoning damage plus 9 (2d8) necrotic damage.
The plague spreader releases toxic gas in a 30-foot-radius sphere centered on itself. Each creature in that area must make a DC 12 Constitution saving throw, taking 14 (4d6) poison damage on a failed save, or half as much damage on a successful one. A Humanoid reduced to 0 hit points by this damage dies and rises as a zombie (see its stat block in the Monster Manual) 1 minute later. The zombie acts immediately after the plague spreader in the initiative count.