Araneae's Warding Spider
Conjuration (Creation)
Level: Sor/Wiz 5
Components: V, S, F
Casting Time: 1 action
Range: Close (25 ft. + 5 ft./2 levels)
Effect: Phantom spider
Duration: 1 hour/level or until discharged, then 1 round/level
Saving Throw: None
Spell Resistance: No

You conjure up a large phantom spider that is invisible to everyone but yourself. It then guards the area where it was conjured. The spider immediately begins making a very loud clicking sound if any Small or larger creature other than you approaches within 30 feet of it (those in the area when the spider is conjured may move about the area, but if they leave and reenter, they set it off). The spider can see invisible and ethereal creatures. It does not react to figments, but it does notice shadow illusions. It is stationary.

If an intruder approaches to within 5 feet of the spider, it stops clicking and visciously bites the victim (+10 attack bonus, 1d6+1 points of damage plus poison that inflicts 1d4+1 temp. Dex. damage, Fort. DC = to caster's DC for a 5th level spell). The spider also gets any bonuses apporopriate to an invisible creature (+2 to attack bonus and defender loses any Dexterity bonus to AC). The spider is considered ready to bite intruders, so it delivers its first bite on the intruder's turn. Its bite is considered +3 for purposes of damage reduction. The spider cannot be attacked, but it can be dispelled.

The spell lasts for 1 hour per caster level, but once it has started making noise, it lasts only 1 round per level. The spell ends if you ever move more than 100 feet from the spider.

Focus: A spider preserved within a piece of amber.