Vinetrap

Vines choked with thorns, blossoms, leaflets, and other floral debris burst to life on and around the subject of this spell, winding around limbs and armor and making it progressively more difficult for the subject to maneuver.

When this spell is cast, the subject may attempt a Reflex save. Success indicates that the vines fail to take root and the spell has no effect. On a failed save, the subject's base speed is immediately reduced by 5 feet. Each round thereafter, the subject must make another successful Reflex save or his speed is reduced by another 5 feet. This occurs each round until he is reduced to a speed equal to half of what it was before the spell was cast.

As a full-round action, the subject or an adjacent creature can tear the vines off the subject's body, resetting the speed penalty to just 5 feet, though the vines continue to grow each round thereafter for the spell's duration, requiring additional checks, unless it is actually dispelled. The spell's effects can also be prematurely ended by dealing at least 20 points of fire damage to the subject. When the spell's duration ends or the effect is terminated, the vines immediately wilt and the subject's speed returns to normal. Regardless of the subject's base speed, the vines cannot reduce a creature's speed below 5 feet.

This spell has additional effects depending on which version you cast, chosen when you cast the spell.