It would be ridiculous to try and out-do what Sean K. Reynolds has already brilliantly done for D&D 3.5 in The New Argonauts so at the start of every one of these posts I’m going to 1) thank him for making that supplement (thank you Sean!) and 2) tell you to go download it (it’s free–give it 5 stars because damn). This blog series is not intended to be a reproduction of that product, only a conversion update. Go get it.

Post 1: What You Need To Play

Master Page for D&D 5E Ancient Greece/Monster List

Cerberus

Huge beast, neutral
Armor Class 15 (natural armor)
Hit Points 152 (16d12+48)
Speed 50 ft.

Saving Throws Dex +5, Con +6
Skills Insight +5, Perception +7, Stealth +5, Survival +4
Damage Resistances cold, fire, necrotic, radiant
Senses darkvision 200 ft., passive Perception 22
Languages Common
Challenge 8 (3,900 XP)

Ageless. Cerberus cannot suffer from frailty of old age, die from old age, or be aged magically.
Snake-Tail. Cerberus’ uses its Dexterity modifier for attack and damage rolls with its snake-tail.
Three Heads. Cerberus gains double his proficiency bonus to and has advantage on Wisdom (Perception) checks. In addition, he has advantage on saving throws against being blinded, charmed, deafened, frightened, stunned, or knocked unconscious.

ACTIONS
Multiattack. Cerberus makes three bite attacks and one snake-tail attack.
Bite. Melee Weapon Attack: +9 to hit, reach 10 ft., one target. Hit: 11 (1d10+6) piercing damage. If the target is a creature, it must succeed on a DC 17 Strength saving throw or be knocked prone.
Snake-Tail. Melee Weapon Attack: +5 to hit, reach 15 ft., one target. Hit: 5 (1d6+2) piercing damage plus 7 (2d6) poison damage.

Cerberus is a huge and ugly dog with three heads and a snake instead of a tail. His main purpose at the gate to the underworld is to keep the dead from escaping, but he sometimes challenges the rare living creature that tries to get in.

Cerberus takes advantage of his three heads by making trip attempts until an enemy falls prone, then using his remaining attacks on the prone creature. He’s rather single-minded in his attacks, preferring to kill one opponent before dealing with other enemies (although he moves to keep creatures from flanking him).

An Intelligence (History) check reveals the following information: 10—Cerberus is the three-headed dog guarding the gate to the underworld. 15—His tail was a poisonous snake, and he kept the dead from escaping back into the world.