Giant Hamster

Huge monstrosity, chaotic evil

Armor Class 16 (natural armor)
Hit Points 189 (18d12 + 72)
Speed 40 ft., burrow 20 ft.

22 (+6) 12 (+1) 19 (+4) 11 (+0) 14 (+2) 8 (-1)

Skills Survival +7
Damage Resistances bludgeoning, piercing, and slashing from nonmagical weapons
Damage Immunities poison
Condition Immunities charmed, exhaustion, frightened
Senses darkvision 60 ft., passive Perception 12
Challenge 15 (13,000 XP)

Special Traits

  • Magic Resistance. The giant hamster has advantage on saving throws against spells and other magical effects.
  • Radioactive Aura. Creatures who enter or begin their turn within 10 feet of the giant hamster take 7 (2d6) necrotic damage and must make a successful DC 15 Constitution saving throw or be poisoned for 1 minute. A poisoned creature can repeat the saving throw at the end of each of its turns, ending the effect on a success. If the saving throw is successful, or the effect ends for it, the creature is immune to being poisoned by the giant hamster’s aura for 24 hours, but not to further necrotic damage.
  • Siege Monster. The giant hamster deals double damage to objects and structures.


  • Multiattack. The giant hamster makes one bite attack and two claw attacks.
  • Bite. Melee Weapon Attack: +11 to hit, reach 5 ft., one target. Hit: 15 (2d8 + 6) piercing damage and the target is grappled (escape DC 17). Until this grapple ends, the target is restrained and the hamster can’t bite another target.
  • Claw. Melee Weapon Attack: +11 to hit, reach 10 ft., one target. Hit: 16 (3d6 + 6) slashing damage.
  • Energy Ray (Recharge 5-6). The giant hamster fires a ray of energy from its eyes in a 60-foot line that is 5 feet wide. Creatures in the area must succeed on a DC 15 Constitution saving throw or take 54 (12d8) necrotic damage and be sickened for 1 minute. While sickened, a creature reduces its maximum hit points by 5 at the start of each of its turns. Magic such as lesser restoration can cure the sickened effect early.
  • Swallow. One grappled creature must make a DC 17 Strength saving throw or it is swallowed and the grapple ends. While swallowed, the creature is blinded and restrained, it has total cover against attacks and other effects outside the hamster, and it takes 14 (4d6) acid damage and 14 (4d6) necrotic damage at the start of each of the hamster’s turns. If the hamster takes 25 damage or more on a single turn from a creature inside it, the hamster must succeed on a DC 25 Constitution saving throw at the end of that turn or regurgitate all swallowed creatures, which fall prone in a space within 10 feet of it. If the hamster dies, a swallowed creature is no longer restrained by it and can escape from the corpse using 15 feet of movement, exiting prone.


A green aura surrounds this enormous creature, which resembles nothing other than a bloodthirsty hamster. Its eyes blaze with monstrous hunger.

None know the origin of this terrifying creature, save that its coming brings nothing but sickness and death. Creatures who encounter the giant hamster are chased until they collapse from exhaustion, after which they are devoured. Even if a creature decides to fight the hamster dead on, the hamster’s very existence weakens the defenders.

No matter how many humanoids the giant hamster eats, its hunger is never sated. It seeks specifically bipedal prey, but will not turn away a free meal if it is a beast or even a fiend or undead. Towns and cities are not free of the giant hamster’s predations. In fact, it often seeks out these conglomerations of morsels as easy targets.

Eventually, it moves on after all the townsfolk have either been devoured or fled.

Section 15: Copyright Notice

Tome of Horrors © 2018, Frog God Games, LLC; Authors: Kevin Baase, Erica Balsley, John “Pexx” Barnhouse, Christopher Bishop, Casey Christofferson, Jim Collura, Andrea Costantini, Jayson ‘Rocky’ Gardner, Zach Glazar, Meghan Greene, Scott Greene, Lance Hawvermale, Travis Hawvermale, Ian S. Johnston, Bill Kenower, Patrick Lawinger, Rhiannon Louve, Ian McGarty, Edwin Nagy, James Patterson, Nathan Paul, Patrick N. Pilgrim, Clark Peterson, Anthony Pryor, Greg Ragland, Robert Schwalb, G. Scott Swift, Greg A. Vaughan, and Bill Webb