Wyvern Watch

This spell is known as wyvern watch because of the insubstantial haze brought forth by its casting, which vaguely resembles a wyvern. 

It is typically used to guard some area against intrusion. Any creature that approaches within 1" of the area in question is subject to attack from the spell force. The "wyvern" will strike, and any creature so attacked must make its saving throw versus Spell or else stand paralyzed for 1 round per level of the caster, or until freed by the spell caster, by a dispel magic spell, or by a remove paralysis spell. 

A successful saving throw indicates that the target creature was missed by the attack of the wyvern-form, and the spell remains in place. As soon as a target creature is successfully struck by the wyvern-form, the paralysis takes effect and the force of the spell itself is dissipated. The spell force will likewise dissipate if no intruder is struck by the wyvern-form for 8 hours after the spell is cast.

Any creature approaching the space being guarded by the wyvern-form may be able to detect its presence before coming close enough to be attacked; this chance of detection is 90% in bright light, 30% in twilight conditions, and 0% in darkness. 

The material component is the cleric's holy/unholy symbol.