Phase Spider click to see monster

Size/Type: Large Magical Beast
Hit Dice: 5d10+15 (42 hp)
Initiative: +7
Speed: 40 ft. (8 squares), climb 20 ft.
Armor Class: 15 (-1 size, +3 Dex, +3 natural), touch 12, flat-footed 12
Base Attack/Grapple: +5/+12
Attack: Bite +7 melee (1d6+4 plus poison)
Full Attack: Bite +7 melee (1d6+4 plus poison)
Space/Reach: 10 ft./5 ft.
Special Attacks: Poison
Special Qualities: Darkvision 60 ft., ethereal jaunt, low-light vision
Saves: Fort +7, Ref +7, Will +2
Abilities: Str 17, Dex 17, Con 16, Int 7, Wis 13, Cha 10
Skills: Climb +11, Move Silently +11, Spot +4
Feats: Ability Focus (poison), Improved Initiative
Environment: Warm hills
Organization: Solitary or cluster (2-5)
Challenge Rating: 5
Treasure: None
Alignment: Always neutral
Advancement: 6-8 HD (Large); 9-15 HD (Huge)
Level Adjustment:

Phase spiders are aggressive predators that can move quickly from the Ethereal Plane to attack opponents on the Material Plane.

A typical phase spider’s body is 8 feet long. It weighs about 700 pounds.

Phase spiders cannot speak.

Combat

Phase spiders dwell and hunt on the Material Plane. Once a spider locates prey, however, it shifts to the Ethereal Plane to attack, attempting to catch its victim flat-footed. The spider shifts in, bites its victim, and retreats quickly back to the Ethereal Plane.

Ethereal Jaunt (Su)

A phase spider can shift from the Ethereal Plane to the Material Plane as a free action, and shift back again as a move action (or during a move action). The ability is otherwise identical with ethereal jaunt (caster level 15th).

Poison (Ex)

Injury, Fortitude DC 17, initial and secondary damage 1d8 Con. The save DC is Constitution-based.

Skills

A phase spider has a +8 racial bonus on Climb checks and can always choose to take 10 on a Climb check, even if rushed or threatened.