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This rat startles upon detection. Within seconds, the one rat becomes four, and then the four quickly multiply into sixteen rats.

Doppelrat CR 1

XP 400
N Tiny magical beast
Init +2; Senses darkvision 60 ft., low-light vision, scent; Perception +1


AC 14, touch 14, flat-footed 12 (+2 Dex, +2 size)
hp 11 (2d10)
Fort +3, Ref +5, Will +1


Speed 15 ft., climb 15 ft., swim 15 ft.
Melee bite +6 (1d3–4)
Special Attacks arcane mitosis, disease


Str 2, Dex 15, Con 11, Int 2, Wis 13, Cha 2
Base Atk +2; CMB +2; CMD 8
Feats Weapon Finesse
Skills Acrobatics +2 (+6 jump), Climb +10, Stealth +19, Swim +10; Racial Modifiers +4 Stealth, uses Dex for Climb and Swim


Arcane Mitosis (Su)

A doppelrat under duress creates clones of itself at the beginning of its turn. Each round for 4 rounds, the number of live doppelrats quadruples but never exceeds 20. Each duplicate appears in the same square as any other rat, can take a move or standard action the round it appears, and has 1/4 the main rat's current hp (minimum 1). After the last multiplication of rats, all surviving clones perish in 8 rounds. If the original doppelrat dies, its arcane mitosis ends, but the clones remain for 8 rounds. A doppelrat may not use this ability until 10 minutes have passed from the previous use.

Disease (Ex)

Degenerate cloning—injury; save Fort DC 11; onset 1 day; frequency 1/day; effect 1d3 Str damage, 1d3 Con damage, and the victim becomes shaken for 1 hour (Will DC 11); cure 2 consecutive saves. Doppelrats created through arcane mitosis can also transmit this disease.