Ether Scarab (CR 1)

Tiny Outsider
Alignment: Always neutral
Initiative: +6 (+2 Dex, +4 Improved Initiative); Senses: Listen +3 and Spot +3

AC: 14 (+2 size, +2 Dex), touch 14, flat-footed 12
Hit Dice: 1d8 (4 hp)
Fort +2, Ref +4, Will +1
Speed: 10 ft.
Space: 2 1/2 ft./0 ft.
Base Attack +1; Grapple -8
Attack: Bite +2 melee
Damage: Bite 1d3-1
Special Attacks/Actions: Wounding
Abilities: Str 8, Dex 15, Con 10, Int 1, Wis 9, Cha 4
Special Qualities: Death burst, outsider traits, planar rip
Feats: Improved Initiative
Skills: Listen +3 and Spot +3
Advancement: 2-3 HD (Small)
Climate/Terrain: Any land or underground
Organization: Solitary, pair, cluster (3-5), or swarm (6-11)
Treasure/Possessions: None

Source: Monster Manual II

Wounding (Ex): A wound resulting from an ethereal scarab bite attack bleeds for an additional 1 point of damage per round thereafter. Multiple wounds from such attacks result in cumulative bleeding loss (two wounds for 2 points of damage per round, and so on). The bleeding can be stopped only by a successful Heal check (DC 10) or the application of a cure spell or some other healing spell (heal, healing circle, or the like).

Death Burst (Ex): An ether scarab that dies on the Material Plane explodes harmlessly, causing a planar rip (see above) between the Material Plane and the Ethereal Plane. This hole in the planar fabric lasts 1d4+1 rounds.

Outsider Traits: An ether scarab has darkvision (60-foot range). It cannot be raised or resurrected.

Planar Rip (Su): By ripping at the planar fabric with its mandibles, an ether scarab can create a two-way portal between its own plane and another (usually the Material). This hole between the planes appears tiny, but it can accommodate any Large or smaller creature traveling in either direction. A planar rip closes in 1d4+1 rounds.