Arachnoid Mouther* (CR 6)

Large Aberration
Alignment: Always neutral evil
Initiative: +6 (Dex); Senses: darkvision 60 ft., Listen +7, and Spot +13
Languages: Common and Undercommon

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AC: 22 (-1 size, +6 Dex, +7 natural), touch 15, flat-footed 16
Hit Dice: 7d8+7 (38 hp)
Fort +3, Ref +8, Will +5

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Speed: 40 ft., climb 20 ft.
Space: 10 ft./15 ft.
Base Attack +5; Grapple +14
Attack: Slam +9 melee (1d4+5) or bite +4 melee (2d6+2 plus poison)
Full Attack: 8 slams +9 melee (1d4+5) and bite +4 melee (2d6+2 plus poison)
Damage: -
Special Attacks/Actions: Poison

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Abilities: Str 20, Dex 23, Con 13, Int 4, Wis 10, Cha 7
Special Qualities: Arrow evasion, immunity to mind-affecting effects
Feats: Alertness; Blind-fight; Combat Reflexes
Skills: Climb +13, Hide +6, Jump +11, Listen +7, and Spot +13
Advancement: 8-14 HD (Large); 15-21 HD (Huge)

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Climate/Terrain: Underground
Organization: Solitary, pair, or brood (3-5)
Treasure/Possessions: Standard

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Source: Underdark

Poison (Ex): Bite, Fortitude DC 14, initial and secondary damage 1d6 points of Strength damage.

Arrow Evasion (Ex): An arachnoid mouther's crazy whirl of arms and shifting central head grant it a 20% miss chance against attacks from arrows and crossbow bolts.

Immunity to Mind-Affecting Effects (Ex): An arachnoid mouther is immune to all mind-affecting effects (charms, compulsions, phantasms, patterns, and morale effects).

An arachnoid mouther gains a +4 racial bonus on Hide checks and a +6 racial bonus on Jump and Spot checks. Because it has a climb speed, it also receives a +8 racial bonus on Climb checks and can always choose to take 10 on Climb checks even if rushed or threatened.