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A rat raised to be used as a test sample by a research organization. It escaped the facility, and thanks to its high reproductive rate its numbers are exploding. Having been used in an experiment to see what would happen to monsters continually exposed to magic power, it gained great physical ability and intelligence. On top of being able to sniff out traps, it is also resistant to poison. It is an incredibly wicked monster which holds great resentment towards the humans who subjected it to such cruel experiments.

Lab Rat (CR 5)

XP 1,600
LN Small Magical Beast
Init +5; Senses Low-light vision, scent; Perception +12


AC 21, touch 17, flat-footed 15 (+5 dex, +1 dodge, +4 natural, +1 size)
hp 54 (6d10+18)
Fort +8, Ref +10, Will +5
Immune disease and poison status effect;
Weakness Fire


Speed 40 ft., climb 20 ft., swim 20 ft.
Melee Bite +9 (1d6+2 plus disease), 2 Claws +9 (1d4+2)
Special Attacks Bacteria, Critical Attack, Disease


Str 15, Dex 20, Con 16, Int 2, Wis 16, Cha 4
Base Atk +6; CMB +7; CMD 22 (26 vs. trip)
Feats Dodge, Power Attack, Skill Focus (Perception)
Skills Climb +13, Perception +12, Stealth +18, Swim +13; Racial Modifiers use Dex to modify Climb and Swim


Bacteria (Su)

1/day, the lab rat releases a toxic bile towards his target within 30 feet away. The target must make a Fortitude save (DC 16) or receive the Sap status effect for 1d8 rounds. Blue mages may learn this ability as a 3rd level spell (Knowledge: Nature DC 21).

Critical Attack (Ex)

Once every 1d3 rounds as a standard action, the lab rat can inflict more pain than normal. If they succeed at hitting with their bite attack, the damage is 1d6+2 x 1.5 for total damage.

Disease (Ex)

Filth fever: Bite—injury; save Fort DC 16; onset 1d3 days; frequency 1/day; effect 1d3 Dex damage and 1d3 Con damage; cure 2 consecutive saves. The save DC is Constitution-based.