Burning Entanglement

This spell functions as entangle, except it sets the foliage on fire. A creature that begins its turn entangled by the spell takes 4d6 points of fire damage (a successful Reflex save halves this damage), and a creature that begins its turn in the area but is not entangled takes 2d6 points of fire damage (a successful Reflex save negates this damage). Smoke rising from the vines partially obscures visibility. Attacks made in the smoke or against anything in the smoke must contend with concealment (20% miss chance). When the spell's duration expires, the vines burn away entirely.