Mouse (CR -)

Fine Animal
Alignment: Always neutral
Initiative: +2 (Dex); Senses: scent, Listen +6, and Spot +2

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AC: 20 (+8 size, +2 Dex), touch 20, flat-footed 18
Hit Dice: 1/4d8 (1 hp)
Fort +2, Ref +4, Will +1

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Speed: 10 ft., climb 10 ft.
Space: 2 1/2 ft./0 ft.
Base Attack -; Grapple -
Damage: -
Special Attacks/Actions: -

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Abilities: Str 1, Dex 15, Con 10, Int 2, Wis 12, Cha 2
Special Qualities:
Feats: -
Skills: Balance +10, Climb +12, Hide +24, Listen +6, Move Silently +10, and Spot +2
Advancement: -

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Climate/Terrain: Any land and underground
Organization: Solitary, pair, family (3-10), or swarm (10-40)
Treasure/Possessions: None

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Source: Converted

Mice have a +4 racial bonus to Hide and Move Silently checks and a +8 racial bonus to Balance checks. They use their Dexterity modifier for Climb checks.

A mouse familiar gives its master a +2 bonus to Hide checks.