Entangle

This spell causes existing natural growth in a 40- by 40-foot area to become overgrown and difficult to pass through. If a creature was in the target area when the spell materializes, or enters it, it must succeed a save vs. Spells or become tangled in the overgrowth for the duration of the spell. A creature who is tangled in this way must spend its full round to wade through the overgrowth, with their movement affected as noted below. Creatures can move through the area with difficulty. Small and man-sized creatures passing through the area move at ¼ of their normal movement, while larger creatures move at ½ of their normal movement.