Cantrips are minor spells I studied by wizards during their apprenticeship, regardless of school. The cantrip spell is a practice method for the apprentice, teaching him how to tap minute amounts of magical energy. Once cast, the cantrip spell enables the caster to create minor magical effects for the duration of the spell.
So minor are these effects that they have severe limitations. They are completely unable to cause a loss of hit points, cannot affect the concentration of spellcasters, and can only create small, obviously magical materials. Furthermore, materials created by a cantrip are extremely fragile and cannot be used as tools of any sort. Lastly, a cantrip lacks the power to duplicate any other spell effects.
Whatever manifestation the cantrip takes, it remains in effect only as long as the wizard concentrates. Wizards typically use cantrips to impress common folk, amuse children, and brighten dreary lives.
Common tricks with cantrips include tinklings of ethereal music, brightening faded flowers, glowing balls that float over the caster's hand, puffs of wind to flicker candles, spicing up aromas and flavors of bland food, and little whirlwinds to sweep dust under rugs. Combined with the unseen servant spell, these are the tools to make housekeeping and entertaining simpler for the wizard.
Upon casting this spell, the wizard causes a vivid, fan-shaped spray of clashing colors to spring forth from his hand. From one to six creatures (1d6) within the area are affected in order of increasing distance from the wizard. All creatures above the level of the spellcaster and all those of 6th level or 6 Hit Dice or more are entitled to a saving throw vs. spell. Blind or unseeing creatures are not affected by the spell.
Creatures not allowed or failing saving throws, and whose Hit Dice or levels are less than or equal to the spellcaster's level, are struck unconscious for 2d4 rounds; those with Hit Dice or levels 1 or 2 greater than be wizard's level are blinded for 1d4 rounds; those with Hit Dice or levels 3 or more greater than that of the spellcaster are stunned (reeling and unable to think or act coherently) for one round.
The material components of this spell are a pinch each of powder or sand that is colored red, yellow, and blue.
When this spell is cast upon a nonmagical fire such as a campfire, lantern, or candle), it causes the fire to flash and shoot arrows of flame. All creatures within 10 feet of the fire source suffer 1 point of damage per level of the caster (maximum of 10 points). Victims who roll a saving throw successfully suffer no damage.
A spider climb spell enables the recipient to climb and travel upon vertical surfaces as well as a giant spider, or even hang upside down from ceilings. Unwilling victims must be touched and are then allowed a saving throw vs. spell to negate the effect. The affected creature must have bare hands and feet in order to climb in this manner, at a movement rate of 6 (3 if at all encumbered).
During the course of the spell, the recipient cannot handle objects that weigh less than a dagger (one pound), for such objects stick to his hands and feet.
Thus a wizard will find it virtually impossible to cast spells if under a spider climb spell. Sufficient force can pull the recipient free; the DM can assign a saving throw based on circumstances, the strength of the force, and so on.
For example, a creature with a Strength of 12 might pull the subject free if the subject fails a saving throw vs. paralyzation (a moderately difficult saving throw). The caster can end the spell effect with a word.
The material components of this spell are a drop of bitumen and a live spider, both of which must be eaten by the spell recipient.