According to Wikipedia Cerberus is a multi-headed hound (usually three-headed) which guards the gates of Hades, to prevent those who have crossed the river Styx from ever escaping. Cerberus featured in many works of ancient Greek and Roman literature and in works of both ancient and modern art and architecture, although, the depiction and background surrounding Cerberus often differed across various works by different authors of the era. The most notable difference is the number of its heads: Most sources describe or depict three heads; others show it with two or even just one; a smaller number of sources show a variable number, sometimes as many as 50.
Cerberus’ adjusted statistics for Weird ‘n Wild Creatures is Attack 28, Defense 19, and Life 504.
Huge Outsider (Extraplanar)
Hit Dice: 28d8+392 (504hp)
AC: 29 (-2 size; +4 Dex; +17 Natural) Touch: 12 Flat-footed: 25
Attack: Base Attack/Grapple: +24/+32
Attack: Bite +42
Full Attack: 3 bites +42, tail slap +40
Damage: Bite 2d6+17 (19-20/x2)
Snake Tail 2d6+8 (x2) plus paralysis
Special Attacks: Frightful Presence, Snake Tail, Turn Undead
Special Qualities: Ghosttouch, True Seeing, SR 30, See in Darkness, Immunities, Improved Uncanny Dodge, Plane Shift, Telepathy 100ft.
Saves: Fort +30, Ref +20, Will +18
Abilities: Str 44, Dex 18, Con 38, Int 10, Wis 14, Cha 12
Skills: Diplomacy +23, Hide +16, Intimidate +20, Jump +45, Knowledge (religion) +20, Knowledge (the planes) +20, Knowledge (history) +20, Listen +24, Move Silently +24, Sense Motive +26, Spot +24, Survival +26 (+28 on other planes), Swim +37
Feats: Alertness, Weapon Focus (bite), Improved Critical (bite), Improved Initiative, Track, Snatch, Multiattack, Power Attack, Run, Endurance.
Frightful Presence (Ex): Everyone within 300ft. must succeed at a Will save (DC 24) or become shaken. This condition lasts till the opponent is out of range. A successful save renders that opponent immune to Cerberus’ presence for 24 hours.
Snake Tail (Ex): Opponents hit by Cerberus’ tail must succeed at a Fort save (DC 38) or become paralyzed for 1d6 minutes
Turn Undead (Su): Cerberus can turn undead as a 28th level cleric. The souls of destroyed undead are sent back to Hades.
Ghosttouch (Su): Cerberus’s bites are treated as ghosttouch weapons.
True Seeing (Su): Cerberus is permanently affected by a true seeing spell (caster level 20th)
See in Darkness (Ex): Cerberus can see 120ft. in darkness, even in magical darkness.
Immunities (Ex): Cerberus is immune to mind affecting spells, spell-like abilities and effetcs. He is also immune to level and ability draining attacks.
Plane Shift (Su): Cerberus can freely shift between Hades and any other plane. When returning back to Hades he always arrives in the exact spot he wanted to.
The d20 statistics are from Lord Zordran’s conversion on D20Forge. These statistics were inspired by International Masters Publishers Weird ‘n Wild Creatures.