Deadly Dancer (CR 3)

Medium Aberration
Alignment: Often chaotic neutral
Initiative: +6 (+2 Dex, +4 Improved Initiative); Senses: darkvision 60 ft., Spot +1, and listen +1

AC: 18 (+6 Dex, +2 natural), touch 16, flat-footed 18
Hit Dice: 4d8+12 (30 hp)
Fort +4, Ref +7, Will +3
Speed: 60 ft.
Space: 5 ft./5 ft.
Base Attack +3; Grapple +5
Attack: Appendage blade +9 melee
Full Attack: 3 appendage blades +9 melee
Damage: Appendage blades 1d6+2/18-20/x3
Special Attacks/Actions: Augmented critical, improved whirlwind attack
Abilities: Str 14, Dex 22, Con 17, Int 11, Wis 8, Cha 15
Special Qualities: improved uncanny dodge
Feats: Alertness; Weapon Finesse
Skills: Balance +8, Hide +7, Jump +21, Move Silently +7, Spot +1, Tumble +15, and listen +1
Advancement: 5-8 HD (Medium); 9-12 HD (large)
Climate/Terrain: Warm land and underground
Organization: Solitary, pair, or troupe (3-8)
Treasure/Possessions: 50% goods or items

Source: Tome of Magic

Augmented Critical (Ex): Each of a deadly dancer's appendage blades threatens a critical hit on a natural attack of 18-20 and deals triple damage on a successful critical hit.

Improved Whirlwind Attack (Ex): As a standard action, a deadly dancer can make one appendage blade attack at its full base attack bonus against each opponent within reach.

Improved Uncanny Dodge (Ex): A deadly dancer retains its Dexterity bonus to AC when flat-footed or struck by an invisible attacker, and it cannot be flanked except by a rogue of at least 8th level.

A deadly dancer never stops moving in combat. It tumbles into the midst of foes, slashes at all within reach, and then tumbles to a different spot to slash at the same enemies again. Even when not using its improved whirlwind attack, a deadly dancer can balance on one leg or arm and lash out at foes with each of its three other appendages.